The Time of the Dinosaurs: A Dangerous Journey - The Time of the Dinosaurs, #1

Yui, Enno, and We-Wow are three young dinosaurs living in the nesting highland. When the herd comes under attack, they are carried away by the river and must dodge spinosauri, hide from pterosaurs, and outthink velociraptors as they journey home. But prowling in the shadows is Kowa-the deadly, the dangerous, the dreaded TYRANNOSAURUS REX.