Hidden treasure at the Chicago Public Library

I made a very interesting visit to the Public Library in Chicago, and I am now reading Featherstone's "War Game Campaigns." Very interesting, as all classics are despite the almost 40 years passed by since publication.
There are a few "old school" books available for circulation, and I think I will take advantage of the opportunity in coming weeks. Not that I lack reading materials, as my wife is quick in pointing out: but you know, the most interesting book to read is always the one I will read next...