The Stranger

Rachel and the other Animorphs infiltrate a secret Yeerk base using cockroach morphs only to encounter unexpected dangers. Their mission halts when a powerful mysterious entity known as the Ellimist presents them with a life changing choice. They must decide whether to abandon Earth with their families for safety or stay and continue the fight against the alien invasion.

by Katherine Applegate

Scholastic · First published 1997 · 163 pages