Growing up by the Book is a fantastic book about puberty for 10-14 year olds. The author, Dr Patricia Weerakoon, is a Christian sex therapist and educator. The book has lots of honest information from a Biblical point of view and questions to discuss with your parents. It also has a very useful glossary which explains things clearly. You can find an extract from the book at the CEP store website.
Short and sweet inspirations for Christian teen girls.