Knight of Shadows by Roger Zelazny is the ninth book in the Chronicles of Amber series and the fourth in the Merlin Cycle. The story follows Merlin, son of Corwin, as he delves deeper into the complexities of the magical worlds of Amber and Chaos. Merlin faces new challenges and adversaries while uncovering hidden secrets about his family and his own identity. The novel is filled with intrigue, magical battles, and complex relationships, continuing the richly woven narrative of the Amber universe. As Merlin navigates these turbulent waters, he must make crucial decisions that will impact the fate of both realms.