Avon, New York, 1976, reprint.  ISBN 0-380-00831-9.  MMPB, 192 pages.  Good plus; wraps have a bit of edge and cover wear, light reading creases; binding sound with a very slight lean.  Book store stamp and ink on first page, stamp ink on upper fore-edge page block; remainder of interior clean and unmarked with tanned pages.  ‘A traitor has revealed the royal family’s greatest secret – the ability to manipulate Shadow and travel among all possible worlds – to forces that plot Amber’s destruction.  And Corwin, prince of the blood, must risk all in a deadly assault on evil’s stronghold.  Now, beset by demonic powers beyond imagination, betrayed by a bizarre conspiracy among his own kin, Corwin walks a perilous path toward ultimate knowledge – and terrifying discovery.’ (from rear wrap)