This is one of his shorter novels, but incredibly rich from beginning to end. I don't consider it inferior to any of his books. Some readers will be completely befuddled by his references to obscure mytholigies, his strange spelling of what turn out to be familiar names, and his use of anagrams. My recomendation is to read it. If the names of gods and queens have no resonance, read them as characters in the novel. Don't waste time looking for Manuel's County on a map. This is a fantasy grounded firmly in a fantatsic view of history and human nature and human mythlogy.
At some point something may click. It's not like a secret being revealed; it's just another layer to the story. One of the central dynamics is the contrast between youth and age. This alone may inspire a re-reading. Some may be put off by Cabell's jaundiced view of humanity, its strivings, and its hypocricies. Others may be put off by the clear immoralty of its characters and its raucous blending of fantasy and history. Don't feel sorry for such people; they cause more misery than they suffer.