I have read three of his books so far - Snow crash, Cryptonomincon, and Seveneves. By far his most fully formed and epic book for me has been Seveneves. It is

I have read three of his books so far - Snow crash, Cryptonomincon, and Seveneves. By far his most fully formed and epic book for me has been Seveneves. It is hardcore Sci-Fi at an epic scale both in world building and time. I got 700 pages in when I had to return it to the library or be sent to collections.