 The bottom-right corners of each book provided a little flip-animation of a morphing character.
| | The Animorphs Books
aka The Changelings
by K.A. Applegate
First time travel: Oct 1997
Five kids and their alien friend Ax can change into any animal that they touch, which is a good thing given that they’re the only ones standing between the Yeerks and the conquest of all mankind.
Tim liked the Animorphs even more than their earlier cousin, the Goosebumps books, and I agree. But I asked him recently why the books needed to introduce time travel. Weren’t there enough fantastical elements already? But he pointed out that without time travel, Jake, Marco, Cassie, Rachel, Tobias and Ax couldn’t turn into dinosaurs.- The Forgotten (Oct 1997) Animorphs 11
- The Andalite Chronicles (Dec 1997) a companion prequel
- In the Time of the Dinosaurs (Jun 1998) Megamorphs 2
- Elfangor’s Secret (Apr 1999) Megamorphs 3
 “We were blown through time, Jake,” Cassie said. “We aren’t where we want to be, and we aren’t when we want to be.” 
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