A library I worked at bought the "Anarchist's Cookbook" because they were short of materials on the governmental theory of Anarchy. They also bought, for some reason, "The Poor Man's James Bond."

The Director had a fit, kittens, and other things. The books ended up in Reference (non-circulating) and were stolen within a week.

I once had to buy books on explosives due to patron requests (an engineering company). No sweat -- I bought books on the engineering use of explosives: formulae for calculalting the charges need to cut steel of various types and forms, slurry hole configuration for various strengths of heaving explosives in road construction and so on. I think that they were checked out once in five years....