I like old books too! My pride and joy is a 1923 Los Angeles Wiremans Handbook. It has NEC rules along with LA rules, and a bunch of formulas and diagrams. It is the size that most "pocket" books are now. I will email Bill a poster from the inside of it, so he can post it here. Pretty neat stuff.
I also found a 1893 "Farmer's Pocket Companion" by John Deere Plow Co., which is a catalog of plows, as well as monthly memorandum pages. That's right, I said 1893, not 1993. that makes it 110 years old this year. Wouldn't you know it, it was published by "Plowman Publishing Comapny"