13,000 years ago in the Great Lakes Region, twelve-year-old Twig, a Spirit Dreamer who can see into the future, teams up with best friend Greyhawk and the unpopular shaman Screech Owl to warn villagers of an impending natural disaster that could have devastating environmental effects. Includes review questions, recommended reading, and information on the prehistory of the Great Lakes Region, paleoclimatology, and Clovis culture.

As the filly Estrella leads her herd north to good grass and water, the stallion Hold On, blinded in the canyon fire, is found by the human boy Tijo, who has an ability to understand horses that sets him apart from other humans--but when Hold On and Tijo catch up with the herd, Estrella must decide whether or not the horses should accept this boy or drive him away.