The Clan of the Cave Bear (Earth's Children, #1) - Jean M. Auel First a warning this is not a book for children, there is rape in this book and sex in the later books.

I honestly really like this book, it has an interesting premise and carries it out well. My only problem with it is it does contradict its self at times. While the later books get clogged up with back story and gets weird at times this is the heart and soul of the series.