Marco finds the location of the main Yeerk pool. (It’s underneath the Gap, guys! We don’t have a Gap in Thunder Bay any more. But I remember when we had one—in the nineties.) It’s too difficult to destroy the pool, but if they can find the Kandrona that emits the rays the Yeerks need to live, then they can deal a serious blow to the Yeerks. Don’t worry, the Animorphs have a plan ……