"The Marbury Lens" is a young adult novel by Andrew Smith that explores themes of trauma, reality, and the impact of choices. The story follows Jack, a teenager who, after a traumatic experience, discovers a mysterious pair of glasses that allows him to see alternate realities. These visions lead him to confront his fears and the consequences of his actions. As Jack navigates these alternate worlds, he grapples with the blurred lines between reality and imagination. The novel delves into the psychological effects of his experiences, highlighting the importance of facing one's past and the complexities of human emotions.