(The following comments were left by me on a review by someone who said their 7 year old loved the book. I am also posting this as a review of the book.) Sorry, but I would not let my 7 year old read this book. Too worrying. Homelessness, getting snatched up by scary guys and dragged away to a foster care group home and made to peel potatoes, etc? Not appropriate for such young kids. Scary stuff. I bought this for an 8 year old who has skipped to fourth grade, but after reading the book, I will not be giving it to her. This book is too heavy handed, tries too hard to beat a kid over the head with Einstein references to try to connect some dots which are not well explained, and introduces - while simultaneously glossing over - very scary subject matter. I think kids should be kids as long as possible, and I don’t want to introduce such frightening thoughts as homeless children with no idea who they are, or sinister organizations who kidnap kids and use them in think tanks for solving the world’s problems. I see that the authors are trying to push an agenda of kids being problem solvers, but this is an epic failure because of the sinister aspects involved. This is a NO for me. Definitely NOT for young children.