Applegate Katherine Alice. Megamorphs 02. In the Time of Dinosaurs

When Marco sees a news report about a downed nuclear submarine, he and the other Animorphs set out to find it in dolphin morphs. When the warheads in the submarine detonate, however, the group finds themselves transported through time by a Sario rip, to the era of dinosaurs (the Late Cretaceous period, to be exact). Rachel and Tobias are eaten by a kronosaurus and believed dead by the other Animorphs. The other Animorphs make their way to land, where they encounter a number of dinosaurs, including the Tyrannosaurus rex, which attempts to eat Jake. Jake morphs while inside the beast, injuring it and causing it to spit him out, and die but not before the other three Animorphs acquire it.Tobias and Rachel, meanwhile had escaped from the kronosaurus, and make their own way to land. Tobias' wing has been broken and was unable to be healed by morphing, most likely as a result of the time travel. The two of them have a run-in with a pack of deinonychus, but both manage to acquire the pack's leader and escape. Later they encountered by a vicious antlike alien race known as the Nesk, who attempt to kill Rachel and Tobias.Megamorphs #2: In the Time of Dinosaurs is the second book in the Megamorphs series, a set of companion books to the Animorphs series. With respect to continuity, it takes place between book #18, The Decision and book #19, The Departure. The Megamorphs books are narrated by all six members of the Animorphs, in turns, but there is no specific order, unlike the order of narration in the regular series.