"You spy," Cathal corrected her. "And you sneak into facilities, or you blend into places to do recon." And Cathal wanted to stop talking about Animorphs and be a grown up, he really did, but Marcie had gone and asked him a question, and so it was her fault. "The aliens are called the Yeerks and they're like slugs that crawl inside your ear and take over your brain to enslave you. But they know everything you know so no one even see an invasion is happenin. And a good alien-" Cathal was getting into it now, "he crash lands in a construction sight and these five kids just walkin' home see the ship, and with his dying moments he gives them the power to turn into any animal they can touch, because he knows his people might not get there in time to save humanity and maybe these kids can do at least a little to hold back the tide." He looked at Marcie and said, "look, it was incredibly cool and very emotional when I was reading it as a teen." He tapped on the cover of the book Kaden was holding and added, with great feeling but also full awareness that he was being a dork: "these kids are bloody heroes, and these books are great."