" Funny, interesting, and suspenseful... but at times the story seems forced and I wasn't as satisfied with the solution to the puzzle as I could've been. I really liked the non-fiction essays in the "User's Guide to the Universe" and the descriptions of trying to live on other planets (seeing the effects on the characters really gives you a picture of what it would be like to be there). My kids like this series, so if there's ever another book, we'll probably read it. "
— Jay, 1/3/2014