Mary Pope Osborne Books in Order

After another family move, eleven-year-old Hallie struggles to fit in and turns to her younger brother Mickey for friendship. When he becomes seriously ill, her worries about popularity give way to a much harder family crisis.

Blue blames her mother for her parents' separation and longs to visit her father in New York. Staying with him reveals emotional difficulties she hadn't understood, challenging her loyalties and her picture of both parents.

Eighteen-year-old Sunny Dickens is content with life in her North Carolina hometown until soap-opera star Joe Brady arrives for summer theater. Falling for him unsettles her familiar world and changes what she expects from love.

Told in short episodes, these stories follow Sheriff Mo as he looks after his pond community. Helping a lonely newcomer, settling quarrels and investigating a supposed monster show how friendship fits into his everyday duties.

Twelve-year-old Bailey fears losing the family life she knows as her father prepares to remarry and her brother plans to join the Army. Her anger and attempts to reunite everyone make those changes harder to accept.

Created by the Greek gods, Pandora arrives on Earth with a beautiful box and an order never to open it. This retelling follows the struggle between that warning and her curiosity about what the box contains.

This biography follows Christopher Columbus's efforts to secure ships and funding for a westward voyage. His travels under the Spanish flag connect the explorer's ambitions with the obstacles he faced and the claims he made for Spain.

Jason and his Argonauts travel to the distant kingdom of Aeetes in search of the Golden Fleece. This retelling introduces their mythological adventure, where the heroes' plans must contend with the power and competing wishes of the gods.

A girl leaves her sleeping father on the porch to ride a silver-winged horse through the night sky. Their journey among stars and constellations turns an ordinary evening into a quiet adventure shaped by imagination.

King Polydectes sends Perseus on a dangerous journey to confront Medusa, the monster with snakes for hair. This Greek myth retelling follows a hero whose survival depends on facing a creature with a deadly power.

A child follows a quiet path through forests and past silent animals to the mountain home of Sleep. This bedtime picture book turns settling down for the night into a gentle journey toward a waiting bed.

These brief illustrated stories follow Sheriff Mo and his animal friends in their pond community. The amiable beaver's world includes raccoons, frogs and mice, with friendship at the center of a collection written for beginning readers.

Nine American folk heroes appear in exaggerated adventures, from Paul Bunyan’s extraordinary logging feats to John Henry’s powerful hammer. Retold tales and historical introductions explore the strength, wit and audacity associated with characters who became part of the country’s folklore.

Beauty's wish for a rose draws her family into the world of a mysterious Beast. In this fairy-tale retelling, her loyalty to her father and growing understanding of her host challenge judgments based on appearance.

This illustrated biography follows George Washington's life in chronological order, examining the man who became the United States' first president. Contemporary quotations and historical events connect his personal character with his role in shaping a new nation.

Jack and Annie discover a mysterious tree house filled with books, then find themselves transported to prehistoric times. Surrounded by dinosaurs, they must work out how its magic works and return home before darkness falls.

When butterfly Mimi disappears, Leon Leafwing suspects kidnapping and turns to detective Spider Kane. Their rescue mission takes them toward Emperor Moth's decaying palace in the Dark Swamp, where an insect mystery tests Leon's courage.

The magic tree house carries Jack and Annie to ancient Egypt, where a long-dead queen needs help. Exploring a pyramid becomes a dangerous puzzle as they search for answers and try to avoid becoming trapped themselves.

Members of Spider Kane's secret crime-fighting order vanish near the garden's nightclub district, while gold disappears and his signature is forged. Kane and butterfly Leon Leafwing investigate the connections before the trouble overwhelms their community.

Jack and Annie travel to the Middle Ages and explore a castle where a feast is underway. Unwelcome among its inhabitants, they must navigate its dangers and secret passage while searching for a way back home.

Lord Huldbrand marries the mysterious Undine, but her past and unusual powers begin to trouble him. As a terrifying figure stalks them, his love is tested by fears about who his bride really is.

Molly finds an old dog by the river and follows him deep into the woods. A goat-man reveals that her companion is a prince under a spell, drawing her into an evening of unexpected woodland magic.

The tree house brings Jack and Annie to an island in the age of pirates. Secret maps and the possibility of buried treasure turn dangerous when ruthless sailors threaten their chances of getting home safely.

Jack and Annie travel to the Amazon rain forest and quickly lose their way. With threatening insects and other unfamiliar wildlife around them, they must find a path back to the tree house before they're stranded.

Searching for the missing Morgan le Fay, Jack and Annie travel to ancient Japan and meet a ninja master. Learning the ninjas' secrets becomes urgent when hostile samurai threaten to stop their mission before it begins.

Jack and Annie arrive in the ocean and explore a coral reef in a miniature submarine. An octopus and a hungry shark turn their underwater adventure into a struggle to reach safety, with dolphins offering possible help.

Jack and Annie travel to the future Moon to find the final object needed to free Morgan from a spell. Limited oxygen, a mysterious moon man and their mouse's strange behavior complicate the search.

This illustrated introduction explores the histories, beliefs and practices of seven religious traditions. Osborne explains worship and its influence on art, laws and customs, helping young readers understand different ways people express faith around the world.

Still wearing bathing suits, Jack and Annie arrive in the freezing Ice Age. Encounters with cave people and woolly mammoths offer discoveries, but the cold and a saber-toothed predator make this journey a test of survival.

Jack and Annie reach a Wild West town that may be haunted. Horse thieves, a lost colt and a cowboy named Slim complicate their riddle-solving mission, while a ghost may hold the help they need.

A boy receives a rocking horse at Christmas and shares imaginary adventures with it. As he grows older, the horse is put away, waiting in the attic for someone to bring its adventures to life again.

Jack and Annie arrive in ancient China, where the Dragon King has ordered books burned. They try to save a story from destruction while avoiding the emperor's soldiers and finding a way to complete their mission.

Jack and Annie visit ancient Greece during the Olympic Games, only to discover that girls cannot attend. Annie's determination to see the competition puts both siblings at risk as they try to navigate the prohibition.

The tree house takes Jack and Annie to Africa's plains, where Annie helps wildebeests cross a rushing river. A honeyguide and a Maasai warrior offer new encounters, but nearby lions threaten to make their adventure dangerous.

A seal hunter helps Jack and Annie prepare for the Arctic cold, but their journey turns perilous when they become stranded on cracking ice. A nearby polar bear raises hopes of help and fears of another threat.

In 1763 Pennsylvania, Quaker girl Catharine Carey Logan and her brother are captured by Lenape people. Her diary follows fear, separation and growing understanding as life among a new community challenges what she believes about home.

This retelling draws on the Gospels to introduce the life of Jesus alongside paintings by artists including Giotto, Fra Angelico and Botticelli. Religious narrative and visual art offer young readers different ways to encounter the same stories.

Jack and Annie travel to Pompeii just before Mount Vesuvius erupts. Searching for a Roman scroll becomes a race against time as burning ash threatens the city and cuts off their route back to the tree house.

Jack and Annie travel to an island in ancient Ireland to recover a story. A friendly monk helps their search, but approaching Viking invaders threaten their mission and force them to find courage in unfamiliar surroundings.

Jack and Annie bring enchanted dog Teddy to the Great Plains, where a Lakota boy teaches them about buffalo hunting. When events go wrong, they must respond to a stampede that puts everyone in danger.

In an Indian forest, Jack, Annie and enchanted dog Teddy discover tigers trapped by poachers. The children look for a way to protect the animals while facing the risk of getting too close to a dangerous predator.

Jack and Annie travel back to the Titanic as disaster approaches on its maiden voyage. With the ship's passengers in danger, the siblings must decide how they can help while finding a way to save themselves.

After her mother's death, Adaline is left with relatives in St. Louis while her father, Kit Carson, travels west. Facing prejudice and forced servitude, she sets out to find him and reconcile the cultures shaping her identity.

The magic tree house takes Jack and Annie into the American Civil War, where they meet nurse Clara Barton. Helping wounded soldiers forces the children to confront suffering and discover what courage and compassion mean near a battlefield.

Jack and Annie arrive in Australia just as a wildfire threatens the forest. A baby kangaroo and a koala need their help, turning a journey to meet unfamiliar wildlife into an urgent effort to reach safety.

This nonfiction companion answers questions raised by Jack and Annie's dinosaur adventure. It explores when dinosaurs lived, their sizes, other prehistoric animals, and the evidence scientists use to learn about creatures that disappeared millions of years ago.

Kate exchanges the family cow for magic beans and climbs the enormous stalk that grows from them. Discovering a greedy giant and a stolen castle, she must rely on resourcefulness to face a danger much larger than herself.

How were castles built, and what did becoming a knight involve? This nonfiction companion explores medieval homes, training, and armor, giving young readers the background behind Jack and Annie's adventure in The Knight at Dawn.

Ginny promises to keep a journal for her older brother as the Civil War reaches Gettysburg. When fighting overwhelms her hometown and Jed joins the Union army, her diary records the war's effects on family and community.

Madeline Beck moves to a Long Island boardinghouse while her father serves in the Pacific. As America enters World War II, she organizes local contributions to the war effort and discovers that danger may be closer than she imagined.

Jack and Annie arrive on a snowy colonial night as George Washington prepares a surprise attack. With terrible weather threatening his plans, they must find a way to help without letting an important moment in history go wrong.

An invitation to Christmas Eve in Camelot sends Jack and Annie into King Arthur's legendary world. Their visit becomes a quest to save the kingdom, demanding courage even its greatest knights have been unable to provide.

Arriving in San Francisco in 1906, Jack and Annie are caught in the city's devastating earthquake. With streets becoming dangerous around them, they must act quickly to help others and survive a disaster unfolding before their eyes.

This nonfiction companion explores ancient Egyptian life, the reasons people made mummies, and the construction of pyramids. Questions about mysterious writing and daily routines help young readers connect Jack and Annie's adventure with the civilization behind it.

This nonfiction guide investigates real pirates, their ships, flags, and treasure. Questions about life at sea and stories such as walking the plank help readers compare familiar pirate legends with the history behind Jack and Annie's adventure.

This nonfiction companion explores rain forest weather, unusual plants, and the creatures living among the trees. Questions about insects and conservation encourage young readers to look beyond Jack and Annie's adventure and consider why these habitats matter.

Jack and Annie travel to an 1870s prairie schoolhouse, meeting a young teacher, her students, and a bully. Their visit grows far more dangerous when threatening weather approaches, requiring the siblings to help children who cannot easily escape.

Ginny and her family move to Washington during the Civil War's final months, facing a difficult winter. Working as a servant to help them survive, she records hopes for peace alongside changes that challenge her understanding of the future.

Jack and Annie travel to Africa's mountains and encounter gorillas whose size initially frightens them. Annie quickly makes a connection, but Jack struggles to join in as the siblings search for another special kind of magic.

This tall tale follows Mose, a firefighter whose strength and courage have become larger than life. His rescues in old New York celebrate service and bravery while introducing young readers to a legend inspired by a real volunteer.

This nonfiction companion explores the universe, the moon, the sun, and the experience of space travel. Jack and Annie's questions guide young readers through science and exploration, connecting their lunar adventure with facts about the world beyond Earth.

Jack and Annie arrive in Elizabethan England and meet William Shakespeare, who needs help with his actors. Stepping into his latest production means facing their own fears as the siblings try to keep the performance from falling apart.

Jack and Annie travel to Plymouth in 1621 and are asked to help prepare a Thanksgiving feast. Unfamiliar cooking and clamming methods turn simple tasks into challenges, leaving them worried their mistakes could disrupt the celebration.

After killing seven flies at once, a seamstress advertises her achievement on her coat and sets off into the world. A giant misreads her boast, launching a series of challenges she must handle through cleverness rather than strength.

Odysseus and his crew struggle onward toward Ithaca after escaping the Cyclops, but new dangers block their route. Encounters with cannibal giants and a powerful witch lead him toward a fearful journey into the land of the dead.

After fighting in the Trojan War, Odysseus leads his men on the long voyage home. Reaching the island of the Cyclopes traps them with Polyphemus, a giant whose strength forces Odysseus to rely on cunning to survive.

This nonfiction guide investigates the Titanic's construction, life aboard the ship, and the disaster that ended its first voyage. Accounts of passengers, survivors, and the search for the wreck deepen the background to Jack and Annie's adventure.

After the Civil War, Ginny's family moves from Washington to New York City and tries to build a new life. Her diary follows changing responsibilities and an interest in theater as she finds reasons for hope amid uncertainty.

How do dolphins communicate, and how do sharks find food? This nonfiction companion explores the lives and differences of these ocean animals, answering questions Jack and Annie bring back from their adventure in Dolphins at Daybreak.

A boy spends the Fourth of July with three generations of his family in a small town. Parades, games, food, music, and fireworks turn the holiday into a shared experience of celebration, community, and summer traditions.

Merlin sends Jack and Annie to investigate a haunted castle connected to the missing Stone of Destiny. With young magician Teddy's help, they must enter its silent halls and solve a mystery that threatens the realm of Camelot.

Jack and Annie visit a Hawaiian island of long ago and learn to surf with new friends. Strange changes around them reveal an approaching tidal wave, forcing the siblings to turn a joyful visit into an urgent rescue.

Continuing toward Ithaca, Odysseus must navigate dangers that threaten both his ship and his men. The deadly Sirens, six-headed Scylla, and the whirlpool Charybdis test his judgment as the voyage home becomes another struggle for survival.

Odysseus remains trapped on Calypso's island while suitors threaten his wife and son in Ithaca. A mysterious visitor encourages Telemachus to seek his father, offering the family hope through the possible intervention of the goddess Athena.

This nonfiction companion examines tornadoes, hurricanes, snowstorms, and the tools used to predict dangerous weather. Jack and Annie's questions help young readers understand how severe storms develop and why learning about them matters beyond an adventure story.

This nonfiction companion examines colonial life and events that led to the American Revolution. Questions about the Stamp Act, Minutemen, and Boston Tea Party help readers understand the conflict behind Jack and Annie's encounter with George Washington.

Jack and Annie's questions lead readers into ancient Greek clothing, recreation, and the origins of the Olympics. This nonfiction companion compares early athletic competitions with the modern Games, adding historical background to the adventure Hour of the Olympics.

Jack and Annie travel to Venice during Carnival, carrying research, magic rhymes, and mysterious instructions from Merlin. When flooding threatens the city, they must learn how to use their new resources wisely before the danger overwhelms it.

Odysseus finally reaches Ithaca, but his home is occupied by men pursuing Penelope and threatening his son. With Athena's help, he and Telemachus begin preparing to challenge the intruders and reclaim a kingdom changed by his long absence.

Merlin sends Jack and Annie on another mythical quest, with young sorcerer Teddy helping them along the way. Underwater caves, selkies, a Spider Queen, and a magical sword create challenges that call for courage and cooperation.

Back in Ithaca, Odysseus faces suitors who want his wife and control of his kingdom. Joining forces with Telemachus and receiving Athena's aid, he prepares for a confrontation that will determine whether his long journey truly brings him home.

When Merlin and Morgan le Fay disappear, Jack and Annie travel with Teddy and Kathleen to a frozen kingdom. Solving the Ice Wizard's riddle and overcoming their fears may be the only way to rescue the missing magicians.

This nonfiction companion to Thanksgiving on Thursday explores the Pilgrims' Atlantic crossing and settlement at Plymouth. It answers questions about the Mayflower, survival in a new home and the foods served at the first Thanksgiving, using photographs and illustrations.

This nonfiction companion explores life during the Ice Age, including how early humans survived the cold and created cave paintings. Jack and Annie's questions also lead to explanations of saber-toothed cats, woolly mammoths and their disappearance.

Jack and Annie travel to a Middle Eastern desert, where meeting a Bedouin tribe introduces them to an unfamiliar way of life. Camel journeys, oases and ancient writings shape an adventure complicated by the danger of sandstorms.

This picture-book retelling of Sleeping Beauty places Prince Bob at the center of the familiar enchantment. A sinister spell, a spindle and a century-long sleep frame a fairy tale in which a resourceful princess takes the active role.

This nonfiction companion to Vacation Under the Volcano investigates how Rome became an empire and how its people lived and enjoyed themselves. It also examines Pompeii's destruction, combining historical information with photographs and illustrations for young readers.

Merlin sends Jack and Annie to rescue a unicorn, but their destination is Depression-era New York City. Searching a crowded modern city for a magical creature presents an unexpected puzzle in another journey through the magic tree house.

Jack and Annie arrive at the 1889 World's Fair in Paris with an urgent message from Merlin for four mysterious magicians. Finding their recipients among the enormous crowds and international exhibits requires discovering what makes these figures extraordinary.

This illustrated nonfiction book reconstructs everyday life in Pompeii before Mount Vesuvius buried the Roman city. Archaeological discoveries provide clues to its inhabitants and routines, while artwork inspired by ancient frescoes helps bring the lost community into view.

Jack and Annie journey to seventeenth-century Edo, entering a Japanese city of beauty and fierce samurai. With only a research book and a magic wand governed by three rules, they must navigate another unfamiliar historical world.

Trying to relieve Merlin's sadness, Jack and Annie travel to Renaissance Italy in search of a secret of happiness. Spending time with Leonardo da Vinci challenges them to learn from his extraordinary mind and ambitions beyond their usual research.

This nonfiction companion to Polar Bears Past Bedtime explores the Arctic's climate, wildlife and human history. Questions about polar bears crossing thin ice and the foods eaten by early Arctic inhabitants introduce young readers to life in the far north.

This nonfiction companion to High Tide in Hawaii investigates the forces behind tsunamis, earthquakes, volcanoes and avalanches. Jack and Annie's questions guide explanations of natural disasters, the scientists who study them and ways people respond to dangerous events.

The magic tree house leaves Jack and Annie on a tiny deserted island in the ocean. Rescue comes from a vessel carrying explorers and scientists, but joining its search for a sea monster brings an unexpected kind of adventure.

Jack and Annie visit Antarctica as their search for the secrets of happiness continues. In a barren landscape far from their familiar world, encounters with penguins become part of a mission that challenges their expectations of what happiness requires.

This nonfiction companion to Eve of the Emperor Penguin introduces penguin behavior and the Antarctic environment. It explores food, huddling and survival alongside the race to the South Pole and the work carried out at modern research stations.

This nonfiction companion to Dark Day in the Deep Sea investigates unusual ocean animals and the creatures behind sea-monster legends. Giant squid, dragonfish and adaptations for finding food in darkness introduce young readers to the mysteries of deep water.

Jack and Annie travel to New Orleans to inspire a musician whose work will bring joy to millions. Meeting a young Louis Armstrong introduces them to jazz, while encounters with real ghosts complicate their mission in the city.

This nonfiction companion to A Good Night for Ghosts examines famous ghost stories, beliefs about spirits and tales from different cultures. It also explores ghost hunters, using Jack and Annie's questions to investigate why these stories endure.