This is one of my favorite Judy Blume books (I've read all but about 2 of her books). This time it's written about a boy! I'd never really read a book about a boy going through puberty, so it was interesting to see Tony's point of view. I don't think it's too mature at all, I think it's appropriate for anyone about 12 and up. Boys and girls will like it. If you're ever looking for a good book to read, choose any Judy Blume title. Her best books are Just As Long As We're Together, Here's To You Rachel Robinson, Fudge-A-Mania, Superfudge, and Then Again, Maybe I Won't. Chose one of those titles, and I guarantee you'll love it.