I don't know of a book, especially in color.. Sorry. But, I always liked Herz' "A Collector's Guide to Nevada Gaming Checks and Chips" (1995). It has a nice introductory section on molds and other differences in chips. You can order it here:
http://www.chipguide.com/books.htm

Then there are my 10 web pages:
http://www.antiquegamblingchips.com/molddesignindex_site.htm
Robert