"The Secret of Convict Lake" is a historical novel by C. J. Box that explores the lives of a group of escaped convicts hiding in the Sierra Nevada mountains. The story is set in the late 19th century and delves into themes of survival, betrayal, and the quest for redemption. The novel is inspired by the real-life events surrounding Convict Lake, a picturesque location known for its stunning scenery and rich history. The lake was named after a group of prisoners who fled from a nearby prison and sought refuge in the area, leading to a dramatic chase by law enforcement.