It's summer vacation for you and the Animorphs. Controller activities seem to have slowed down. This only makes you more suspicious: What are the Yeerks up to now?
A series of missions turns summer into less of a vacation and more of a battle to know the secret.
You discover that Cassie's parents are meeting with a certain Mr. Foster about a new animal survey being conducted at a nearby mining site. Is this project legitimate or a cover for a new Yeerk plan? You'll need to sneak into Chapman's office to gather information; use your cockroach morphs to follow him to a Yeerk Pool hidden inside a cavern; and fight any Hork-Bajir or Human-Controllers that get in your way as you investigate the enemy area.
You also find out that a new Community Center is opening in town. The director of the center seems to be a nice guy, but he could also be a Human-Controller disguised as a do-gooder. Will the Center become a recruiting center for The Sharing or will the Animorphs be able to turn it into a safe haven? You'll have to case the grounds and even slip into the director's office in mouse morph to search for clues. Watch out: Visser Three is nearby.
Before you can defeat the enemy, you'll need to gather tools and acquire as many morphs as you can. If you are able to stop the Yeerks from succeeding, you just might be able bring this secret war to an end once and for all.
Animorphs: Know The Secret