The ARRL Handbook for Radio Amateurs, published by the American Radio Relay League (oversized thick HC, 1991, $4, which is 1/3 the internet price.)
This is something you never would come in here looking for. But we have it. So if you are interested in learning what radio amateurs were up to in 1991, this is the find of the century!
No? Well, I thought it was at least worth a try. This is another one of those books so far over my head I don't know what to say about it.
Look for it on the new non-fiction table. (Later-elec.)