They're not product specific but you could start with Dealers of Lightning
and Fire in the Valley
, which cover Xerox PARC and the origins of personal computing in the 80s. They both offer a good primer on the industry and set the stage for everything that happened from 1977 to the mid 90s.
A book covering the rise and fall of Cyrix would be a lot of fun; there are undoubedly some very useful lessons to be learned there, both technical and business.