The first book of Neal Stephenson's that I picked up was Anathem and I found that to be really tough going. This one though turned out to be a totally different beast( and a beast it is, at around 1100 pages). I was hooked in the first 100 pages(although admittedly it took me really long to finish) Cryptonomicon connects two story lines one based in World War II and the other in 1990s internet era and they are connected by some strange family coincidences. There is a lot of math and computer science going on here and Neal Stephenson does an admirable job of explaining it all. This is a geek novel if ever there was one with the most developed character being a fantasy card playing, slightly round around the paunches unix loving geek.The novel is very detailed in everything that it does and Stephenson takes great pains to explain everything that is being talked about and even goes so far as to provide equations. Heck there is a perl script thrown in with the actual text