The Unknown
About this book
Having learned that someone has discovered proof of alien life and hidden the proof on the top-secret base called Zone 91, Cassie and the Animorphs struggle to keep the evil Yeerks away from the place.
Subjects
- animorphs (fictitious characters), fiction
- children's fiction
- collectionid:animorphs
- extraterrestrial beings
- extraterrestrial beings, fiction
- fiction
- juvenile fiction
- metamorphosis
- science fiction
- series:animorphs