The Citadel is an archive of information for George R.R. Martin's A Song of Ice and Fire.
New to the series? Read our spoiler-free review of A Game of Thrones.
[NOTE: This interview is actually of George R.R. Martin interviewing Stephen King, rather than vice versa, but there are various personal anecdotes embedded within it that make it seem a proper addition to the collection.]
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.