Finally, the Animophs get a win! Feels great, and sufficiently well-earned considering the string of losses and near-deaths that they've experienced up to now. 
 Of course, it's a win facilitated by (view spoiler)[ a god-like superbeing with powers of time travel. (hide spoiler)] 
 Back when I first read Animorphs in elementary school I was totally on board with this insanity. Now as an adult it seems kind of crazy that they would introduce such world-breaking power into their sci-fi universe so quickly. We're not even in double digits yet! This is the kind of thing I would expect to happen in a midpoint or low point of a series, rather than the seventh book. But then again, I bet Applegate had no idea how long this series was going to last, and like a tv writer with a pending cancellation, maybe she wanted to get all her ideas in. And if you interpret this book without any knowledge of the 49 books that were to follow, this book is a very suitable low-point-climax for the series. Everyone is feeling pretty hopeless, and the resulting victory feels really satisfying. High marks all around.