The second book in the Earth's Children series was just as great as the first one.
It tells of Ayla's life after being banished from the Clan and of her wanting to find *the others*, people like her. Of her not knowing where the others might be and finding a cave and how she goes about setting up home there by herself and gets prepared to spend a winter there alone. It tells of her having to learn to go against Clan beliefs so she can survive.
It also tells of Jondalar who undertakes a journey with his brother, how they meet another group of people and stay with them, what happens with them, why they leave and how it comes about that Ayla rescues Jondalar from Baby, a cave lion that she raised from a cub.
The two people then spend time in this valley, learning about their different ways, until they decide to leave.
How this women spends a few years in this valley by herself is a great read and her meeting and having to learn the ways of a stranger adds interest.