If you dig American Gods, you'll either dig the shit out of Zelazny's other stuff or you'll hate the fuck out of it. Go give For A breath I Tarry a shot. If that works for you, try Isle of the Dead. Then try Creatures of Light and Darkness. The book that should have been made into a movie was Damnation Alley. It's fuckin' Road Warrior. It's about a biker named Hell Tanner who is the only guy in Los Angeles who has successfully crossed post-nuclear Armageddon America to Boston, so he gets a reprieve from jail in order to lead an expedition trying to get plague vaccine there. Planes don't work because nuclear war fucked up the atmosphere so much that the sky is full of hurricane-force winds that constantly drop shit on the plains. That's a young adult novel written in 1967. Hollywood turned it into this: