Fleming's James Bond series is certainly worth a read... they are a little dated now, and definately un-PC (I'll leave that up to you if that is a pro or a con
), but still great yarns, all of them.
Tom Clancy's Cardinal of the Kremlin is also a very good spy novel. Everything you ever wanted to know about brush-passes, dead drops and so on...
Paul.
Canberra, Australia