Cryptonomicon is great if you haven't read it. I think it's a canonical piece of scifi. It's two generations of nerds from a family. One is a WW2 codebreaker, and his grandson is a startup tech guy. The book tells the story by switching between 1940s and 1990s. Lots of historical people, alternate timeline stuff. Lots of interesting ideas about economics and information. A great read.
One could ad Neal Stephenson books in general. Especially Snow Crash. Jointly, with Cryptonomicon, one of the best books I've ever read! In Snow Crash, the author envisioned stuf like Google Earth or Second Life, only in a much more advanced way. The book was written in 1992 :-)
