J.S.
Hi,
I think I have the same book for my daughters. actually i had 2 of them. I talked to them about the books and gave them to read about 4th grade, or when I started noticing "changes" in them. maybe for one it was more interest in boys, or one who was getting breasts. Then they could read it when they felt ready. My youngest has the books now she is in 5th grade. she got them over a yr ago, but was not ready yet.... but now she is. you know your child the best, and said you were very open, use your best judgement, take the cue's from your daughter.
good luck.
jenn