Ayla and her young family are welcomed by the Zeladonii and they make a home for themselves in a stone cave, but, while their first priority is to care for her daughter, Jonayla, Ayla and her husband, Jondalar, encounter problems in their new community and Ayla uses her skills to come up with innovations to make life easier as she prepares for her initiation as a Zelandoni.

6,000 years in the past, twelve-year-old Torak and his guide, a wolf cub, set out on a dangerous journey to fulfill an oath the boy made to his dying father--to travel to the Mountain of the World Spirit seeking a way to destroy a demon-possessed bear that threatens all the clans.

Polly's stay with her grandparents in Connecticut becomes an extraordinary experience as she encounters old friends and mysterious strangers and finds herself traveling back in time to play a crucial role in a prehistoric confrontation.

"A groundbreaking book about how technological advances in genomics and the extraction of ancient DNA have profoundly changed our understanding of human prehistory while resolving many long-standing controversies. Massive technological innovations now allow scientists to extract and analyze ancient DNA as never before, and it has become clear--in part from David Reich's own contributions to the field--that genomics is as important a means of understanding...

Friends Ook and Gluk are always getting into trouble with their village chief until they pass through a portal into a future run by the chief's descendant, where they learn kung fu so they can return to the past and free their people.