Some good titles to get from the library are "Fundamentals of Dimensional Metrology" and "Machine Tool Reconditioning".
Also the American Society for Metals "Metals Handbook Volume 3, Machining"
A reasonably recent copy of Machinery's Handbook is good to have. No real how-to info, more of a reference for dimensions and standards, most of which have not changed in long enough that the difference between a new edition (they are on #27 now) and an older one is pretty minimal. Try to get a #20 or higher. Good book to have.
The Amateur's Lathe by Sparey is a good book on lathe operations. It is a British book, and that requires a bit of translation from english to english, but it is very good. Busy Bee sells it for about $25
Lee Valley Tools sels a lathe book titled How to Run a Metal Working Lathe. It is a reprint of a 1940's South Bend Lathe manual, aka How to Run a Lathe. Really good basics on lathes. Cheap! Like under $10 per copy. So far I have given away two or three copies of this book with lathes that I have sold.
Guy Lautard in Vancouver sells a series of books called the Machinist's Bedside Reader. They are worth the cost IMO, but you may wish to order them in on the library's interlibrary loan program, if they do not have a copy in the system in your area. These 3 (4th due out someday soon) books have a lot of great ides as well as some gunsmithing info on making triggers for Mauser actions as well as some info on color case hardening.
Machine Shop Practice, Vols 1 and 2, by Karl Moltrech are really good. Still available new, worth having.
There are a pile of other good books out there as well, but those are the ones that I can think of right now.