I Love this book! Anything by Stuart Gibbs is great and totally recommended. I am so glad that he involved Israel in this book so I could get it. I can't wait for book #2!!!!!! And the Spy School movie.

This book is soooo great! I could read it over and over. An absolute must read!

this book is so good and i read it so so so many times, and that's saying a lot because usually i don't read books more then a few times for a while. the only REALLY disappointing part was the ending. it was a good ending (meaning, it ended out happy), but it never really, like, explained the final equation (you'll know what I'm talking about wen you read the book). but, its still an awesome book and i love it.

I LOVE this book so much!!!! It's super good and I read it like, three times and am super excited for the second one to come out in 2021!! I would recomend it for anyone who likes mystery and suspence, also I agree with LittleHouse85 :) :)

Ohmygod ohmygod ohmygoodness this book was AMAZING and Charlie was SO COOL I wish I were her READ THIS BOOK NOW! It is awesomeeeeeeeeeee 😝🤓😁🤣😂😂😄😝😜😛😋😆😌😊😉😁