This is a great book that you will never want to stop reading. I like this book because it has many good parts that will want to make you keep reading. One of my favorite part was when the main charecter and third child Luke saw the face in the other house and he didn't know what to do,if he should go or just stay home all alone for the rest of his life. My other favorite part was when Luke found out that Jen's dad worked for the population police. He kept thinking that if he had a third child why would he work for them.In this book you can't have more then three children and if you did your third child would be kille. So I hope you are intrested and hopefully you will read this great book.