This story is for intelligent and mature audiences. Prudish narrow minded people and religious fanatics will be offended. The rest of us will enjoy the tale. The Amber series, in my opinion, is Roger Zelazny's master work. It is one huge exciting adventure.
Big things happen to big characters.
He created a hero, Corwin, who does not whine, who uses strength, intelligence, and guile to navigate treacherous situations. A tough and resourceful man, he also has unexpected depth. There is compassion and altruism where least expected. The novels skillfully weave our world into a vast number of parallel worlds. The power struggles would make a Machiavelli gasp in wonder.