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.
Please see the entry for A Knight of the Seven Kingdoms which is a collection containing these novellas, originally published in various anthologies.
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.