These American Girl® books for ages 10+ offer guidance on everything from body image to making a difference. Over $120 Value. Excellent guide books with digestible information that is essential during the tween and early teen years. Publisher recommends ages 10 and up for most of these books, but they are helpful for girls as young as 8. Ages 10+ American Girl A Smart Girl’s Guide To: Staying Home Alone Liking Herself (Even on the Bad Days) Getting it Together Digital World Money Friendship Troubles Drama, Rumors, and Secrets The Feelings Boom The Care and Keeping of You 2 .