This is an action-packed book, filled with twists and turns but also with great characters, science, and adventure! Great female hero and exciting mystery. Amazing read-impossible to put down and recommended for anyone who likes a thrilling read!

An awesome book that has mistery, action, adventure and science. Great plot, involving Einstein, family problems and a lot of great characters (the main character is a girl, which for me is so cool because most books the main character is a boy), but it doesn't involve anything that has to do with Judaism, sou if your looking for a book with Judaism contents this is not the book for you. If you're looking for a book with the characteristics I described or you liked the plot IT'S A DEFINETILY READ.

It was kind of exciting but I didn't feel to interested in it.

In the book, Charlie Thorne had to find an equation for the CIA (and her half brother) before a terrorist cell did. It included a lot of adventure and action. Definitely read it!

I really loved this book. It's just awesome, and you HAVE to read it.