The Guns of Avalon
Across the worlds of Shadow, Corwin, Prince of blood royal, heir to the throne of Amber, gathers his forces for an assault that will yeild up to him the crown that is rightfully his. But, a growing darkness of his own doing threatens Corwin's plans, an evil that stretches to the heart of the perfect kingdom itself where the demonic forces of Chaos mass to annihilate Amber and all who would rule there.This is the immediate sequel to Nine Princes in Amber. Many recommend reading The Guns of Avalon together with Nine Princes in Amber.
Lord of Light
Earth is long since dead. On a colony planet, a band of men has gained control of technology, made themselves immortal, and now rules their world as the gods of the Hindu pantheon. Only one dares oppose them: he who was once Siddhartha and is now Mahasamatman. Binder of Demons. Lord of Light.A strange yet compelling mix of the American Revolution (per Zelazny), sword and planet fiction, and Indian religious myth, Lord of Light is a classic. Read it, and then watch Argo to see the effect it had on history.
The Dark World, by Henry Kuttner
An amnesiac man is transported to another world -- a new world, where he has a new name, and a new destiny!
World War II veteran Edward Bond's recuperation from a disastrous fighter plane crash takes a distinct turn for the weird when he encounters a giant wolf, a red witch, and the undeniable power of the need-fire, a portal to a world of magic and swordplay at once terribly new and hauntingly familiar. In the Dark World, Bond opposes the machinations of the dread lord Ganelon and his terrible retinue of werewolves, wizards, and witches, but all is not as it seems in this shadowy mirror of the real world, and Bond discovers that a part of him feels more at home here than he ever has on Earth.Sounds familiar, doesn't it? Henry Kuttner was a major influence upon Roger Zelazny, and elements from the Dark World appear in the Chronicles of Amber, such as the amnesiac recovering from a crash, worlds that are shadows of the real world, and Ganelon.