Roger Zelazny's Nine Princes in Amber: The Black Road War

From the back of the book: CONQUER THE HEART OF AMBER Amber, that incredible, beautiful, terrifying world where Random rules as king and where Corwin the Murderer wanders free. Amber, world of misbegotten beauty and unrealized power. Land of order, land of oppression, land of destroyed dreams. You are the son of Eric, and you lay your claim on Amber. You're determined to infiltrate the heart of that kingdom. But are you strong enough to survive its many dangers - and claim its savage throne?