Here is a link to an interview with Hazel Edwards. She's the author of some famous children's books, but she has written other things aswell, including F2M: The Boy Within, which is about a biological girl who transgenders to a boy.
To be honest, I haven't read it myself. However, the subject of the book is a rare but important one. The only other novel I've come across on transexuality is Luna, by Julie Anne Peters, which is about a male to female transition. The reason it's important is that there is a high incidence of suicide among transexuals, partly, so I've read, because of the discrepency between the identity they feel and the way their body looks. Imagine a young person who believes they are a woman but who hears the voice of a man coming from them as their voice breaks. It's scary.
So any book that will help them, and especially help society at large to understand instead of being condemnatory, has to be good. Since libraries have avoided the book, and groups have not put it on their lists, it's up to us to spread the word. It's not just for the pleasure of expanding our minds, but we might be helping to save a life.