Sign of Chaos by Roger Zelazny is the eighth book in the Chronicles of Amber series and the third in the Merlin Cycle. The novel continues the adventures of Merlin, the son of Corwin, as he navigates the complex and perilous realms of Amber and Chaos. Merlin is caught in a web of political intrigue, magical threats, and shifting alliances. He must use his wits and magical abilities to overcome various challenges, including confronting old and new enemies, and dealing with the chaotic nature of his own heritage. The story is rich with action, mystery, and the deep world-building Zelazny is known for, further unraveling the intricate plotlines and character relationships in the Amber universe.