The Hand of Oberon (Amber Series, Book 4)

Book 4 of the Chronicles of Amber. One of the princes of Amber desires her destruction... and re-creation of his own design. Corwin and his siblings must discover the plot and mount a defense against the traitor... before it is too late. Can they discover the fate of their father, the stronghold of their enemies, and their long-lost trust of one another in time to save Amber and all of its Shadows from Chaos?