Locus Award Winner, 1986

 

King Oberon has vanished and Shadow menaces the perfect realm of Amber. Family blood has been spilled on the magic pattern that created Amber. To save themselves from the dagger-wielding hand that stabs across the nebulous boundaries of the parallel worlds, the remaining Princes—led by the superhuman Lord Corwin—must find the murderous traitor in their midst … and discover the source of the black road that unites the one true world of Amber with the multidimensional realm of Shadow.