156 pages
English language
Published Jan. 23, 2000 by Gareth Stevens Pub..
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Tobias and the other Animorphs discover that the Yeerks, a parasitic alien race bent on enslaving Earth, plan to test a device that could put an end to the Animorphs' fight against the Yeerks.
Subjects
- Science fiction.
- Extraterrestrial beings -- Fiction.