L.H.
Hi K.~
I ordered a book from Sandi Queen when I was teaching my daughter about puberty and what to expect. Her website is www.queenhomeschool.com If you click on the link "God's plan for growing up" you can see the books. Also on Christianbook.com there are a lot of selections as well.
Good luck in your search. My son is 8 so I am right behind you on this!
Blessings!
L.