We have created a tool for finding your listings that have no photos attached. Go to the Inventory tab from your BiblioDirect menu and select Show Inventory. That will show you all your active listings. 
ook in the "Search Within" box (on the left side) for the line "Without photos" and click on that link.
If you see books on that list that do have photos attached to them, it is most likely because you have performed that search during a re-indexing cycle, and it may take an hour or two for those books to disappear from that list.
Click here for BIBLIO's recommendations and minimum size requirements for book photos.