Here are a few quality links to spy related things:

The best listing of the many spy series available – Spy Guys and Gals –

http://www.spyguysandgals.com

Wikipedia has a pretty comprehensive list of Spy novelists –

http://en.wikipedia.org/wiki/Spy_fiction

Mary Ann Gwinn from the Seattle Times give a nice run down of spies that ended up writing spy fiction –

http://seattletimes.nwsource.com/html/books/2012661822_spies22.html

The Deighton Dossier always has some interesting Spy news –

http://www.deightondossier.net