First two that come to mind are:
1)
Hackers by Stephen Levy: an account of the hacker culture starting at MIT in the late 60s to the video game industry for Apples/Commodores in the early 80s). As an Apple IIe owner in the 80s, this book is extra special. In fact, I'll probably start re-reading it again today, now that it's on my mind again.
2)
Apollo by Charles Murray/Catherine Bly Cox: an account of the Apollo space missions, told by the engineers involved (mainly those in mission control). Fascinating and accessible descriptions of the dream team that was formed, problems they encountered, their ingenious solutions, and what the missions meant to the American people at the time.