Good conspiracy fiction

Undergod

Can anyone here reccomend good works of fiction (Preferably books, but good movies too) that deal with conspiracy theories?

What I'm mainly looking for are books that deal with real-life conspiracies, even in a fictionalised way, and that AREN'T written by Dan Brown.

My first two examples would be the Illuminatus! Trilogy by Robert Shea and Robert Anton Wilson, and the somewhat similar graphic novels The Invisibles by Grant Morrison.

Anything else anyone?

RefulgentGnomon

The Truman Show is great, if that's what you mean...

Capt'n Midnight

The Sett by Sir Ranulph Fiennes - fiction with lots of historical incidents thrown in

http://en.wikipedia.org/wiki/Foucault%27s_Pendulum_%28book%29

Banphrionsa

Jack Higgins wrote a series of novels, some of which ended up as films, and several of which were conspiracy fiction.

Galvia

Ever heard of Smiley's People? An old but good fictional conspiracy can be found in John LeCarre's Tinker, Tailor, Soldier, Spy. Although mostly fiction, there are some historical facts thrown in, too. John LeCarre himself was involved in conspiracies during the great war, and, by the way, John LeCarre is not his real name, but rather his pen name.

Black Swan

"JFK" film directed by Oliver Stone, 1991, based on books by Jim Marrs and Jim Garrison, on the assassination of John F. Kennedy in the USA.