The Secret Explorers 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.

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.