Katherine Roy

Kit, Zander, and M.K. West are finally settling into their new lives at the prestigious Academy for the Exploratory Sciences. But normal school days vanish the moment Kit uncovers another secret map left behind by their brilliant, world-famous father, who recently vanished on a dangerous mission. This new map points to a treacherous, uncharted stretch of the Caribbean known for violent storms and swallowed ships. Even worse, ruthless government agents are already hunting them down, desperate to seize the map for themselves. As two massive world powers inch closer to an all-out war, the West siblings realize their father's hidden discovery might be the only thing that can stop a global disaster. While M.K. works frantically to build a massive, top-secret contraption in her workshop, Kit and Zander must decode the clues and stay one step ahead of their enemies. Packed with high-stakes danger, brilliant inventions, and thrilling escapes, this pulse-pounding adventure will keep you on the edge of your seat as the siblings race to uncover the deadly secrets of King Triton's Lair.

Computers have failed, electricity is extinct, and the race to discover new lands is underway! Brilliant explorer Alexander West has just died under mysterious circumstances, but not before smuggling half of a strange map to his intrepid children—Kit the brain, M.K. the tinkerer, and Zander the brave. Why are so many government agents trying to steal the half-map? (And where is the other half?) It’s up to Alexander’s children—the Expeditioners—to get to the bottom of these questions, and fast.