"Wolf Brother" is a novel by Michelle Paver set in prehistoric Europe. It follows the story of a young boy named Torak who embarks on a quest to save his home from a dark force. After the death of his father, Torak is guided by a spirit wolf, forming a deep bond that helps him navigate the challenges of the wild. Throughout his journey, Torak encounters various tribes and learns essential survival skills. He is joined by Wolf, the spirit animal, and Renn, a girl from a neighboring tribe. Together, they face dangers and uncover the truth behind the evil threatening their world.