A couple of years ago, Ray Bottorff Jr moved here from Detroit, and brought his project to produce a bibliography / price guide to paperback books related to comics with him. Ray's got a ComicBacks Yahoo group which he describes as:
"...a list designed to appeal to both fans of Comic Books and Paperbacks. ComicBacks is a term copyrighted by Ray Bottorff Jr to refer to mostly mass-market sized paperbacks that are comic-related. Comic-related means that the paperback has its origins in Comic Books, Comic Strips, Animation, Hero Pulps or other related Sister Arts. I have no problem including paperbacks in this list which may not have originated in comics, but are of a Super-Hero theme. The list can cover both comic reprinted work and prose material from comics or comic characters.
And if you wish to talk about Big Little Books, Oversize Paperbacks, Oblong Paperbacks or Trade Paperbacks of this "genre" feel free to do so.
Also feel free to post your buy/sell/trade lists!"
He's recently posted a link to a 700-page illustrated e-version of his list of ComicBacks. You can join the group through the above link.