Alekhine's books are great. I like Sammy Reshevsky's book "The Art of Positional Play". It is a fine collection of 1970s era games. Karpov's book on his best games is great.
Best Source - Annotated Games??

I second the Alekhine books (esepcially his best games and New York 1924) and Karpov suggestions!
Zurich 1953 by Najdorf (Bronstein's edition is more famous) and San Luis 2005 are great too.
Exactly what the title says. Ive found a couple but most of the games are annotated by amatuers not Masters. Any recommendations?