I loved the Amber series, especially the Corwin books, but my favorite Zelazny novel is A Night in the Lonesome October. When the story is being told by Jack the Ripper’s dog, Snuff, what’s not to love?
Jack and Snuff are players in a game. All the players begin to congregate into one neighborhood at the start of October. Snuff spends his time meeting other animal companions and trying to figure out who is in the game and who is not. But he doesn’t know what side anyone is on. And come the night of the event, anything can happen.