Jean Auel spens a lot of time researching books for here earth children series, and it shows. The books are detailed (sometimes to the extreme) with information on primitive life, the world in which Ayla, the main character lives.

This book, the first in a wonderful series, truly brings to life a time before history. A time when inventiveness would mean the difference between survival and death, a time when there was more than 1 intelligent species on the earth.