Lassie: The Mystery of Bristlecone Pine (Vintage 1967 Hardcover) by Steve Frazee

High in the rugged mountains, where ancient bristlecone pines cling to life against wind and time, Lassie and park ranger Corey Stuart discover a mystery no one expected.

A frightened boy is hiding among the trees - alone, secretive, and calling himself Bristlecone Pine. He won’t say where he came from or why he ran away, only that he can’t go back. As Corey tries to earn the boy’s trust, danger begins to close in, and it becomes clear that someone is searching for him.

With the wilderness as both refuge and threat, Lassie must use her courage and intelligence to protect a child in trouble and uncover the truth before it’s too late.

A suspenseful adventure of loyalty, survival, and the healing power of the wild—starring the world’s most beloved dog.