I second the recommendation of Innovators. Even though it does not go into deep detail, it provides a good overview of the history of computing. It is easy to then follow-up with specific literature if a topic piques one's interest.

In addition, I would also recommend "Intel Trinity" by Michael Malone (http://www.amazon.co.uk/Intel-Trinity-Robert-Important-Compa...). It covers the post-Fairchild era from Intel's point of view.