I'm not sure what it says about the state of the world, but I'm often fascinated that there is no topic on which someone or other has not published. There are, for example, two books available on lost grocery lists:
Milk Eggs Vodka: Grocery Lists Lost and Found (Hardcover)
and the even more interesting A la Cart by performance artist Hilary Carlip.
These are second only to "The Barbed Wire Collector Magazine" (the only remaining magazine on the topic, we are told, which suggests there used to be competitors) as most surprising demographic.... Who are the subscribers here? And what, after over 30 years and nearly 200 issues, is there left to say about Barbed Wire?