A friend of mine lent me his copy of Crypto (by Steven Levy) last week, today I got around to finish reading it (been pretty busy lately as you can tell from close to zero new posts on this blog).
What's especially interesting about this book is the history, the background. In the past, I have read a couple of technical-level books, even attended Crypto conference in Santa Barbara in 1997. What this book highlights are the connections between the acting persons (mathematicans may forgive me) as well as the whole shenanigans of trying to put the genie back in the bottle. I do remember some of those (PGP, low international key strengths, Clipper), but never read about them in such detail.
If you have some time to spare, definitely worth your time to understand how cryptography went public.