"Cruz and his fellow recruits tackle challenging missions to dispense life-saving medication to gorillas, thwart pangolin poachers, and capture images of the la

Twelve-year-old Cruz Coronado leaves his home in Hawaii to study and travel with other young people invited to attend the elite Explorer Academy in Washington,

An explosive revelation and a familiar face in the sixth book in this adventure-packed series. Still reeling from the life-changing discovery he found buried in

Cruz, Sailor, Emmett, and the gang are on their way to Africa when Nebula misses their intended target and someone close to Cruz ends up on the brink of death.

NOW IN PAPERBACK: On an island nation in the Indian Ocean, the explorers venture through a vast underwater world and take part in a friendly robotics competitio