Margaret Peterson Haddix Books in Order

Maisie is annoyed that her only summer adventure is babysitting siblings while her parents care for Great Aunt Hazel, until cryptic texts and a blank book reveal Hazel was a time traveling “moonleaper” and has chosen Maisie to continue her mission.

A mysterious package on Colin’s doorstep, labeled as a gift from his absent father, contains only a key. Tracing what it unlocks pulls Colin and Nevaeh into dangerous questions about his past, hidden money, and how far people will go to keep secrets buried.

Asked to investigate a series of eerie old photographs in a house above a funeral home, Colin and Nevaeh follow clues back to the Great Depression, uncovering long buried grief, surprising connections, and a “ghost” story with a very human heart.

Zola believes she lives in a flawless twenty second century run by a helpful AI, until a handwritten note suggests her perfect town is a cruel experiment. Her search for the truth leads back to Jessie’s family and another manufactured world built on lies.

Colin finds a shoebox of 1970s letters while cleaning out an attic, and Nevaeh uncovers a suspiciously empty storage unit. As the two team up, the old correspondence leads them into intertwined family mysteries and a new business as kid detectives.

Max grows up surrounded by perfect classmates who never misbehave, until his best friend Josie disappears after hinting at secret “whatnot rules.” His search for her uncovers a school full of android children and hard questions about privilege and identity.

Mysterious coded coins start falling at the Greystones’ feet, carrying desperate pleas from their doubles in the alternate world. To answer, Chess, Emma, Finn, and Natalie must cross back over and confront the force threatening both realities.

Determined to rescue their missing mothers, the Greystone siblings and Natalie reopen the passage to a brutal parallel world where lies are law, then navigate shifting alliances, secret passages, and a corrupt regime that punishes anyone who tells the truth.

When Chess, Emma, and Finn see news of three kidnapped kids with their exact names and birthdays, their mother vanishes and coded clues lead them to a hidden portal, pulling them into a sinister version of their own world.

After a move meant to give her a fresh start, Marin keeps seeing a group of laughing teens who vanish like ghosts. Teaming up with prickly neighbor Charley, she uncovers a time slip tied to his family’s past and her own guilt.

Soccer obsessed Avery is furious when her dad drags her to Spain and invites quiet classmate Kayla along. As the trip unfolds, a buried family secret shatters their assumptions about each other and forces both girls to rethink what family really means.

Captured by Enforcers, Rosi, Edwy, and their friends are shipped to an alien planet and forced to mine strange pearls as slave labor. Tech savvy Kiandra must hack, scheme, and trust an unlikely alien ally if any of the children are going to survive.

Now living together as one uneasy family, human twins Nick and Eryn and their robot stepsiblings Ava and Jackson retreat underground to escape anti robot laws, only to uncover forgotten weapons and systems that could restart the war between humans and machines.

Edwy finally meets his birth parents, then is whisked away again to Refuge City, a crowded, high tech place where questions are dangerous. There he discovers other former Fredtown kids and disturbing evidence that Rosi and the others may be in grave danger.

Twelve year old twins Nick and Eryn are told they can never meet their new stepfather’s kids. Convinced something is very wrong, they investigate and uncover a family secret that stretches from their living room to the fate of humanity itself.

Raised in peaceful Fredtown by gentle guardians, Rosi has always believed adults sent children there for safety. When everyone is abruptly shipped “home,” she and her brother find harsh parents, violent streets, and a truth about Freds and humans that upends everything.

In the final Missing novel, Jonah, his twin Jordan, and their friends face the fallout of an experiment that has un aged the adults around them, forcing them to confront the mastermind behind the time kidnappings and decide what future they want.

After the events of Palace of Mirrors, Princess Desmia discovers that ruling is nothing like a fairy tale. Surrounded by scheming advisers and fresh unrest, she must untangle new plots and decide how to lead a kingdom built on old lies.

Jonah’s life shatters when everyone in his town suddenly un ages into teenagers and he alone stays the same. As time agencies and villains collide, he finally learns his true identity and must decide how far he will go to protect both his families.

Set between Risked and Revealed, this ebook story follows Jonah as he and Katherine scramble to save a pair of time displaced kids, proving that even a “fixed” timeline can hide unfinished business and unexpected second chances.

This short Missing adventure finds Jonah and Katherine chasing a mysterious distress call from the time stream, where an endangered child and a reckless projectionist force them to choose between cleaning up old mistakes and creating new ones.

Jonah and Katherine travel to 1918 Russia to return Alexei and Anastasia Romanov to history, only to face the brutal reality of the revolution and a paradox: recorded history says the royal children died, yet their mission is to save them.

Becca has spent years hiding her identity after her father went to prison for a massive financial crime. Now a high school senior desperate for college money, she starts digging into old secrets and discovers the real danger her family has tried to outrun.

Star pitcher KT blacks out during a crucial softball game and wakes in a world where academics are treated like sports and athletes are on the sidelines. To get home, she must question labels, power, and how kids are sorted into roles.

A glitch sends Jonah and Katherine to 1903, straight into Albert Einstein’s cramped apartment just as news arrives that his hidden daughter Lieserl is gravely ill. Their mission quickly tangles with family secrets and the dangerous power of time travel.

Jonah and Katherine land on Henry Hudson’s ship in the icy Arctic, where mutiny is brewing and history says everyone will be abandoned. To protect time, they must decide how much they can interfere without dooming Hudson or themselves.

Tessa has grown up believing her country is locked in a righteous, never ending war. When local hero Gideon refuses his medal and runs away, she follows, stows away on a rogue plane, and uncovers a truth about the conflict that changes everything.

A boy thinks it will be hilarious to drag his jumpy cousin Thad through a small town haunted house, until strange cold spots and whispered warnings hint that one of the ghosts inside may be very real and in need of help.

A routine mission goes wrong when Jonah and Katherine escort Andrea, really Virginia Dare, to sixteenth century Roanoke and end up stranded themselves, battling storms, sabotage, and a rogue time traveler to keep the lost colony’s fate on track.

Amy and Dan Cahill race rival branches of their powerful family through a deadly puzzle filled gauntlet beneath Shakespeare’s Globe Theatre, where every riddle and alliance could determine who controls the secrets behind the 39 Clues.

Jonah and Katherine follow their friends back to 1483 London and discover Chip and Alex are really the princes in the Tower, destined to die, and they must find a way to “fix” history without sacrificing the boys they came to save.

Former child star Lindsay can hear every word anyone anywhere says about her, a “gift” that drove her into hiding. A tabloid story, a misguided rescue attempt, and a mysterious voice pull her back into the world and toward the truth about her past.

Cecilia has always been told she is the true princess of Suala, hidden in a village while an impostor rules in her place. When danger comes close to home, she runs to the palace to claim her throne and finds a much more complicated truth.

Thirteen year old Jonah has always known he was adopted, but anonymous letters and a vanished airplane full of babies reveal he is part of a time travel conspiracy, forcing him and his sister into a fight to repair history.

Immigrant factory girls Bella and Yetta and wealthy runaway Jane are drawn together by the Triangle Shirtwaist strike in 1910 New York. Their intertwined stories lead up to the historic factory fire and explore the human cost behind labor reforms.

On his first day at a new school, angry fourth grader Dexter punches a classmate and then has to write about it for a class assignment. As he revises his story, he slowly faces the real reasons for his outburst, including fear for his sick father.

In the final Shadow Children book, Luke goes undercover with the Population Police just as a coup topples the regime. Thrown into chaos and propaganda, he must decide whether to stay hidden or risk everything to tell the country the truth about third children.

Days before her thirteenth birthday, Bethany’s parents drop her with an aunt she has never met and vanish. In a small Illinois town where everyone seems to recognize her, she uncovers a dead sister named Elizabeth and a secret tied to illegal human cloning.

Matthias, a former shadow child, is captured by the Population Police and offered a chance to serve them. Torn between survival and loyalty to his friends, he becomes a reluctant double agent inside the heart of the oppressive regime.

Britt thinks her family has lucked out when her brother Bran lands a house sitting job in Florida that lets them live rent free. But Bran’s secretive behavior and strange rules make her suspect they are not supposed to be there at all.

Sukie and her brothers are sure their parents have gone bizarre when every scolding sounds like a scrambled cliché. Determined to uncover what is really going on, the kids launch a playful investigation that turns into an all out kids versus parents stand off.

Timid Trey is thrust into heroism when a raid on Mr. Talbot’s house sends him fleeing into a countryside under Population Police control. With Luke missing and friends imprisoned, Trey must use his bookish knowledge to mount a daring rescue.

When Kira is hypnotized at a sleepover, she blurts out memories of fleeing a war torn city with a different mother and a language she does not recognize. Soon her real mom disappears, a stranger claims to be Aunt Memory, and Kira is dragged to a hidden country built on perfect recall.

Living under the identity of a dead Baron’s son, Luke is summoned to meet his “family” and quickly realizes they have dangerous plans for him. Caught between wealth, lies, and a ruthless bodyguard, he must decide who to trust and what kind of life he wants.

Fourth grader Keely is curious about quiet classmate Anya, who never lets anyone touch her hair. When Anya’s wig falls off at school, Keely must decide whether to follow the crowd or find a way to support a girl coping with alopecia and embarrassment.

Accused of betraying other shadow children, Nina is thrown into prison and offered a deal: help trap three younger kids or face execution. As she decides what to do, she uncovers deeper plots inside the Population Police system.

Janie’s mom starts a sweater knitting business so the family can move to a better school district. When the plan unravels and money for new clothes disappears, Janie wears the returned sweaters to class and claims every embroidered name as one of her many middle names.

Lori resents her mother’s new career as a motivational speaker and the constant airport hopping it requires. A tense trip with her anxious younger brother forces Lori to confront old grief, her mom’s public image, and what it means to grow up in a family still healing.

Forced out of hiding, Luke assumes a dead boy’s identity and enters a strange boarding school where students seem oddly clueless. Sneaking through forbidden hallways and a mysterious outdoor area, he discovers other shadow children and a dangerous informant in their midst.

Melly and Anny Beth were once elderly nursing home residents who agreed to an experiment that reverses aging. Now teenagers growing younger every year, they race to find someone trustworthy to care for them before they regress past the point of remembering who they really are.

After the ball, Ella is engaged to Prince Charming and trapped in a palace where etiquette matters more than honesty. Realizing the prince is kind but shallow and that she wants more than a pretty title, she schemes to escape and build a life on her own terms.

Luke is a forbidden third child who has spent his entire life hiding in an attic, watching other kids play through a vent. Meeting bold neighbor Jen, another hidden child, pushes him to question his government’s population law and his own fear.

Lonely after a move, Dorry is swept into a youth group that promises love, certainty, and purpose. As the Fishers of Men tighten control over every part of her life, she has to find the strength to question their demands and walk away from the only community she has.

Tish treats her English class journal as a joke until her family begins to fall apart. Marking entries “Do not read,” she pours out secrets about an abusive father, a vanished mother, and caring for her little brother while deciding when to finally ask for help.

Jessie thinks she lives in 1840s Indiana until diphtheria strikes her village and her mother reveals the truth: it is really 1996, their town is a sealed tourist attraction, and Jessie must escape to get medicine before more children die.