The Yeerks are stepping up their
invasion tactics. And Marco has problems of his own. His dad is starting to date. But Marco knows his mother might still be alive.
Katherine Alice Applegate (born 1956) is an American author. Applegate's most popular books are science fiction, fantasy, and adventure novels. She has won the Best New Children's Book Series Award in 1997 in Publishers Weekly. She also writes books for young readers as [author_link_7400].
