S.J. King Books in Order

Space expert Roshni and rainforest specialist Ollie are sent to repair a probe orbiting Jupiter before a comet arrives. Asteroids and dangerous spacewalks test their skills in an adventure that combines their mission with facts about exploring the solar system.

Tamiko and Cheng travel to the Jurassic period to save a dinosaur egg from destruction. Outwitting an Allosaurus and helping other prehistoric creatures demands unusual solutions, while their adventure introduces dinosaur behavior, fossils, and the links between ancient reptiles and birds.

Connor and Roshni take a submarine into the ocean to guide a lost pod of humpback whales toward safety. Missing calves and approaching boats complicate their rescue, bringing facts about marine life and changing ocean environments into the adventure.

Gustavo and Kiki travel to ancient Egypt on a mission to help save a museum in their own time. Exploring pyramids and deciphering hieroglyphics, they must stop thieves from taking a pharaoh's treasures while learning how the ancient civilization lived.

A research ship trapped in Arctic ice needs help, and a scientist sent to find rescue has disappeared. Kiki and Connor must locate the missing researcher and free the vessel while discovering how climate change affects the polar environment.

Leah and Gustavo travel to North Carolina to help a botanist protect endangered Venus flytraps. Poachers are stealing the plants for profit, forcing the young explorers to use their scientific knowledge and courage to defend a vulnerable forest habitat.

Ollie and Kiki enter Borneo's rainforest to rescue a lost baby orangutan. Their glider journey reveals another danger when plantation owners plan to clear more forest, giving the explorers a challenge that links animal rescue with protecting its threatened home.

Cheng and Leah visit Mount Yasur in Vanuatu to observe an active volcano. Their excitement becomes urgency when an eruption puts people at risk, forcing the pair to apply their knowledge of geology and biology to a rescue mission.

Kiki and Gustavo investigate a ghostly figure disturbing a medieval castle before an important tournament. Their time-travel mystery draws them into the world of knights and castle life, where practical knowledge may help explain a seemingly supernatural threat.

Tamiko and Ollie journey into the Ice Age to help a herd of woolly mammoths threatened by an avalanche. Using their knowledge of prehistoric creatures and the natural world, they must guide the animals away from a rapidly approaching danger.

Roshni and Cheng travel to the Moon to clear debris threatening an important lunar mission. Navigating rough terrain in a space buggy and collecting rock samples, the explorers combine a practical rescue task with discoveries about Earth's nearest neighbor.

The Timekeepers arrive in Kitty Hawk in 1903 to find the Wright brothers' airplane missing its propeller. Discovering that time pirate DeLay has stolen the essential part, the children must recover it before aviation history is thrown off course.

A warning sends the Timekeepers back to ancient Greece, where the first Olympic Games face sabotage. The young team must uncover time pirate DeLay's plan and prevent him from changing a sporting event whose influence will stretch across centuries.

Leah and Cheng are sent to investigate a network of caves in India, where their mission proves more complicated than expected. Exploring the underground world introduces cave formation, subterranean habitats, and the creatures adapted to life beneath Earth's surface.

Leah and Connor head into the Mexican desert to rescue wolf cubs. Dust storms and the challenges of a dry environment test the explorers, whose journey introduces the plants, animals, and habitats that make desert life possible.

Connor and Kiki search the ocean for pirate treasure, only to discover a basking shark needing their help. Their mission becomes a test of priorities and ingenuity as the young explorers try to save the animal and continue their underwater search.

Visiting the 1889 World's Fair, the Timekeepers expect to witness the unveiling of the Eiffel Tower. Instead, DeLay steals its blueprints, forcing the children to act before his interference disrupts the landmark's construction and changes the course of history.

The Timekeepers travel to ancient Egypt, where Queen Nefertiti urgently needs medicine. Their search for a cure becomes a race against time, combining a mission to protect history with discoveries about the people and customs of the ancient world.

In 1890s New York, the Timekeepers arrive before Nikola Tesla unveils an X-ray machine. When DeLay disguises himself as Thomas Edison and steals the invention, the children pursue him through the city to recover it and preserve history.

The Timekeepers travel to Japan during the Edo period and find themselves caught in a confrontation involving samurai. Their adventure combines the team's effort to keep history on course with discoveries about the people, customs, and conflicts of the era.

A mission takes the Timekeepers into the Viking era, where rival clans are locked in conflict. The young travelers must navigate the struggle while keeping history on course, discovering the people and customs behind a world very different from their own.

Rosa and Luke travel with the Timekeepers to the Aztec capital of Tenochtitlan in 1442. Exploring stepped pyramids, aqueducts, and crowded markets introduces them to a thriving civilization as they continue their work protecting the course of history.