From Ian's list on alternative alternate history novels.
Moorcock might be best known for his sword-and-sorcery Elric novels, but he's also a writer of considerable daring and style. Gloriana tells of a Queen of Albion whose empire stretches from the great continent of Virginia to far Hindustan, and then on to Cathay beyond. Half-familiar figures and place names vie with pagan myths and strange ceremonies inside a palace so vast and rambling that every kind of wonder, and the darkest of secrets, have room to hide. The settings and the language are glorious, and the characters, and their schemes and machinations, come vibrantly alive. This is a vivid dream of an alternate queen and an alternate England.