The book Things Not Seen is about a boy named Bobby, that mysteriously, out of the blue, turns invisible. Bobby and his family have to try and figure out why he turned invisible before people get suspicious about where he is at.
I read this book for a reading group and it is really good. I would recommend it for anyone who likes a mystery. The Sisters Grimm has a lot of details and is very interesting. Also if you like fairy tale characters you would like this book.