It wasn't to long or to short. I loved it so much that I'm reading it for the third time!

This was a great book. I enjoyed the humor, the suspense and the hero is very likeable.

This is an amazing book for a (future)scientist!

Okay, let me just say, I liked this book. Don't get me wrong. But, I have a lot of James Patterson/Chris Grabenstein books, and I love them! A lot. So so so so so so much! But, I kind of expected more from this book. Also,I thought it would be in the first person. You know, when the story is told from one of the character's point of view. It's not. So, I liked it, I didn't love it, so I give it 3 stars.

I have already read this book but didn't own it and wanted to. If you have read Charlie Thorne and the Last Equation from another pj selection ,this book is for you. It is full of mystery suspense and overall greatness.