Pros: Funny, lively, and to the point.
Cons: Some of the material is dated, and is a little dry in parts.
Accidental Empires is a funny, brutally honest examination of high-tech companies in Silicon Valley. Robert X Cringley has the enviable position of being confidant to the movers and shakers, and is more than willing to share the inside scoop on the business and personalities that have shaped Silicon Valley.
Cringley (not his real name) writes in a personable, humorous way, documenting the history of various companies from day one to the present (if they were lucky enough to survive to the modern day).
The strength of the book lies in the examination of the personalities behind the companies - I often was amazed that many of these companies survived the personalities of their founders. Of the people Robert X Cringley writes (Bill Gates, Steve Jobs, and so on) very few end up being portrayed as "good-guys".
While I considered this book excellent, I did have two "negatives". First, that it was published in 1992 and thus is out of date when considering how amazingly fast the industry has progressed since then. Second, it can be a bit dry in spots.
Another book that might be of interest is Nudist on the Late Shift, by Po Bronson. You might also want to check out Triumph of the Nerds, a PBS documentary that briefly covers the material in Accidental Empires, with interviews mixed in for good measure.