This is a longer but unstructured list of important readings on conceptual metaphor. Readers seeking an easier introduction should consult the shorter categorized and properly annotated list of introductory readings on metaphor.
This bibliography contains some of the key texts that have bearing on the conceptual approach to metaphor. (It is basically a selected export of about 80 entries from my EndNote file. The complete list of entries that I have tagged as 'metaphor' in my database is over 600 - I'd be happy to share it.) Some of the texts are annotated in a fairly haphazard fashion. Anybody can register on the site and contribute further entries. Benjamin's MetBib, is of course, the really comprehensive collection, but then, it is not free.