The dark side of bibliophiles

One might think of bibliophiles as a friendly lot. Biblio-friends, so to speak. So what did artist Oliver Herford have in mind when he offered up this dark interpretation of, not biblio-friends, but biblio-fiends for A.S.W. Rosenbach's "Unpublishable Memoirs?"

This drawing is from Rosenbach's
Books and Bidders in the previous post.
Click on the image for an enlarged view.