Not a book, but I just picked up a index card metal box from the Goodwill. Somewhere around 50 index cards, diligently updated with new addresses, half on type half by hand. This guy was in correspondence, or at least subscribed to a half dozen oddball societies, religious groups and more boring local plumbing companies etc. It's a fascinating bit, I think for my next RR&R Challenge, I might try to find out who this guy was. Would make at least for a fun tale cold calling and saying "Hey, can you tell me what the current address you have on file for account #217 is?" . Most recent update looks to be around the year 2000.