Among the Hidden, by Margaret Peterson Haddix, is a "what if" type of futuristic fiction. In this story, the author portrays a society in which families are only allowed to have two children. Luke is that third child in his family, and he must stay hidden in his house, at least until... Sorry, can't tell you that! Are there other third children too? What would happen if they were caught? How did this two child rule come to be? What is Luke going to do? There are so many reasons for you to read this book, that you should be ashamed if you're still reading this, rather than running to the library to get a copy.
This book will excite kids who wonder "what if" about the future. Fans of science fiction and fantasy will likely be interested, as well as people who don't like their third sibling (joke!). It's well-written, and fans will be happy that this is only the first book in the Shadow Children series.