The Clan of the Cave Bear by Jean M. Auel

This book tells the story of Ayla, separated from her family by an earthquake and raised by the Clan of the Cave Bear. Although Ayla is obviously different, one of the Others, she quickly learns the ways of the Clan, even if she finds them unduly strange and restrictive at times. I really enjoyed this story--the characters and their struggles felt real and familiar, even as their surroundings, culture, and customs were totally foreign.