This book is the second book in the series. I just finished it and I'm about to start the third book. I would recommend this book because its really interesting. The book is about a secret spy school for girls. It is called the Gallagher Girl Academy. They always have missions and problems to solve. I would rate this book 5 stars. The 4 main characters are Cammie, Bex, Liz, and Macey. Its a really really good book!!!
-Grayson