I refer to anything I could not put into any specific category as a “Jackdaw”. I am aware that jackdaws are also a species of bird (C. monedula), but I have heard them use a lot by libraries to refer to uncategorizable books, and on the other end of the spectrum, primary source documents. In modern usage I see that the word “jackdaw” is used by some libraries to describe or give a name to their search engines.
We’re only down to a few crappy album covers, which I either felt little inspiration to comment on, or were just pushed aside in the search for an album cover that suited the theme of the day. That is not to say that these are obscure. Some are, but others have remained as common fodder by crappy album cover web pages all over the net, just as was the case in previous posts.