Earth's chidren is a story about an Other girl, Ayla, who loses her parents on an earthquake age 5, and is then raised by the Clan. The habits of the Clan are different from what she'd used to, but she grows to become part of them. But things happen, and she has to face the scary, but also exciting future.
The story in the series is partly historically accurate, and has been told in a way that keeps you sitting with the book for hours.
There are 6 books in the series.
I recommend reading this set, you need to read the first book to see if YOU like it
ps. I guess I could have just copied a review from some bookstore, but I wanted to write it myself (and prolly caused that it doesn't sound half as exciting as it is ).