In the Time of Dinosaurs

When Marco discovers a downed submarine, his adventurous spirit leads him and his friends—Tobias, Cassie, Ax, Jake, and the narrator—on a daring exploration that goes horribly wrong. An unexpected explosion sends them millions of years into the past, landing them in the perilous age of dinosaurs. As they struggle to survive in this dangerous world, their greatest challenge is figuring out how to return to their own time.