http://www.amazon.co.uk/Computer-Called-LEO-Worlds-Office/dp...
"The Soul of a New Machine" by Tracy Kidder
Drags a bit in places, but is still interesting in a history type way. It's the story of Data General building a 32-bit minicomputer in a year in the 1970s.
http://www.amazon.co.uk/Soul-New-Machine-Tracy-Kidder/dp/031...