The two books mentioned above are of course the giants,
and a must have, but there are others!
This is the auction catalogue for Antiquorum from 1994, which contains about 70 pages of text,
Especially the letter exchange between Vacheron and Constantin, about 40 of the pages.
This elegant book is 274 pages.
The auction catalogue for the first 250 years(!) of watchmaking from VC, from 2005.
Very informative. 475 pages!
AND this one, of course
This one of the best!
By Anton Kreuzer.
In German, but it has all facts about watches and movements up to 1970s.
Also easy to follow, even if you don't read German!
Search the internet for these.
The first one is hard to get, but the other two,
use to pop up on ebay from time to time.