I previewed this do my ten year old son. He's begun asking basic questions, so we wanted a tool to aid in our discussion. This book isn't gender specific, which I liked. In general it feels like basic biological information without a lot of embellishment. It says it's for ages 9-12, but I honestly think that must be for more mature children than mine. He's still not quite ready for this yet, but when his questions become more specific, we will be referencing this book. It also includes question/answer sections for the child that I found could help guide conversation, and a parent reference. Very handy.