Many of history's greatest fantasy books go on to receive exactly as much love and praise as they deserve. No matter their origin, these fantasy books are worthwhile and unworthy of their forgotten status. 'Dragonsong' (1986)Image via AladdinWhen a story blends elements of science fiction and fantasy, it's referred to as science fantasy. Part post-apocalyptic, part fatalistic adventure, and part sword-and-sorcery gem, The Dying Earth is easily one of the best fantasy books of the 1950s. It's one of the best fantasy books of the 1990s, hugely elevated by Kay's lyrical, poetic, absolutely gorgeous prose.