Another one of Stuart Gibbs amazing books! I Enjoyed Spy school revolution very much, I love all of Stuart Gibbs books and this one is definitely one of the best. Cant wait for the next one to come out !! I finished this book in less then 3 hours, its probably the quickest book I've ever read. SPOILERS: I like how Erica finally (Kind of ) opens up to Ben however I'm kinda disappointed with Zoe's behavior. She ratted Ben and Erica out and she just wasn't as kind, cheerful, and trustful as she is in the other books. She was Bens best friend (and maybe future girlfriend)in the other books but now it kinda looks like shes taking advantage of him and their friendship :( . In a interview Mr.Gibbs said that Ben definitely going to pick between Zoe and Erica in one of the future books, I think after this book Zoe will no longer be the top choice. He introduces an awesome new character(Erica non spy sister) and there is finally a new villain!! >:). Other than those comments this book was once again one of Mr.Gibbs wonderful creations . It has a killer cliffhanger and If you need a couple books to pass the time until the next spy school I recommend some of his other books. Including Charlie thorn and the last equation, the fun jungle series and the moon alpha base series. Hope you enjoyed this book as much as I did !