I've read Diamond Age and Snow Crash, but not Cryptonomicon. Is it bad? My husband liked it.
The thing about Cryptonomicon is that it took a great deal of effort to stay interested in the book because I don't like war stories. So by the time I got through it, I felt like the ending didn't quite reward my effort. It was rushed and rather anticlimactic. Although, I'd say go ahead and read it. Bobby Shaftoe is one of my favorite Stephenson characters. Just don't expect to like it as much as the Diamond Age or Snow Crash. When you're done, if you haven't already, try The Iron Dragon's Daughter or Stations of the Tide. Swanwick is kind of a perv but the books are still okay.