Disappointing Findings in the Science Fiction and Fantasy Reference Texts

I am really disappointed. You would think Tolkien's theories would at least be mentioned in most of the books on fantasy, but alas they are not. Entries on Tolkien mention his theories, but only a few have entries devoted to any of his concepts. Otherwise, cosmology, creation, etc. don't appear to be mentioned at all. One notable exception from the Science Fiction books is the Encyclopedia of Science Fiction (Call Number: PN3433.4 .E53 1993). This text has an extensive entry on cosmology. This entry discusses the use of alternative cosmologies in science fiction writing. It gives numerous examples and tracks the history of cosmology in science fiction (p. 267-268). It would probably be one of the more useful places to start looking at creation in literature.