As I was working today on BookTracker, I realized that there are quite a few catalogs etc. in Googlebooks, and I was wondering whether there might be a special section of the BookTracker devoted to such material. The rationale would be that there would be more information there than elsewhere about difficult to find titles. This is a type of information that to my knowledge is not getting aggregated elsewhere, but could be assembled pretty painlessly by the folks here, if the works contained in a catalog could be linked to a full catalog record. Thoughts?