Didnt Symphony X have an album based off of the Odyssey? Haven't listened to them, too much, but that's what I've heard.
Sepultura's latest album A-Lex is based off of a Clockwork Orange, but their current sound is bad enough (and reviews have really confirmed suspicions) that I'm reluctant to give it a spin or go near it.
Deep Purple's "Stormbringer" was based on the Michael Moor**** fantasy novel of the same name. And "The Book of Taliesyn" refers to a 14th century manuscript, so....yeah.
Journey to the Centre of the Earth --- Yes
Music Inspired By The Snow Goose -- Camel