On an island nation in the Indian Ocean, the explorers venture through a vast underwater world and take part in a friendly robotics competition. But the tides of good fortune change quickly. Suddenly, Team Cousteau jumps into action to rescue a faculty member from the brink of death. Meanwhile, the team follows the Cruz's mother's clues to a magnificent tomb and center of spirituality precariously perched on the side of a cliff. There, Cruz is confronted...

"The mystery deepens and the action intensifies for 12-year-old Cruz Coronado and friends in the exciting third book in the Explorer Academy series. The adventure continues for Cruz, Emmett, Sailor, and Bryndis as they continue their studies at sea and travel to exotic locations around the world. A mysterious person alerts Cruz to impending danger while he and a few trusted pals explore ancient ruins in Petra, Jordan, and search for another piece...

"The dense, steamy rainforests of northern Borneo are some of the oldest and most magical in the world. Under the shade of the towering tree canopies, majestic elephants and orangutans roam. However, Cruz Coronado is more focused on a tiny leech with a surprisingly painful, slow-healing bite. As he inches closer and closer, he wonders if what he discovered at the top secret Archive is true ... In this sixth installment in the Explorer Academy series,...