I actually really enjoyed The Baroque Cycle. I had read Cryptonomicon more than once, though, so I was prepared to work for it a little! This was back before I was reading e-books, so I have all of those books together in a bag. I've tried to get various family members to read them but I haven't found anybody yet with that level of commitment. I haven't even gotten anybody to read Cryptonomicon yet, for that matter. :-)
Have you read PrairyErth by William Least Heat-Moon? It's one of those deeply detailed books (although nonfiction) that grabs you and won't let go. I don't think it's available as an e-book yet, though.