Elfangor's Secret
Tobias and his friends, a group of young people who have given the power to morph into animals in order to aid the alien Andalites in their battle against the evil Yeerks, face a life-and-death situation when Visser Four, a leader in the Yeerk invasion, finds a time machine.
Science fiction, Juvenile fiction, Metamorphosis, Extraterrestrial beings, Fiction
Katherine Applegate
Katherine Alice Applegate is an American writer, best known as the author of the Animorphs, Remnants, Everworld and other book series. She won the 2013 Newbery Medal for her children's novel The One and Only Ivan. Applegate's most popular books are science fiction, fantasy, and adventure novels. She won the Best New Children's Book Series Award in 1997 in Publishers Weekly. Her book Home of the Brave has won two awards. - [wikipedia](https://en.wikipedia.org/wiki/Katherine_Applegate)