I have been playing WoW for years now, and I enjoy the history and story lines within the game, but find it difficult to really follow all the various character developments and motivations. Is there a 'definitive' set of books that I could read to follow the story? If so, which? I'm not referring to fan fiction or webisodes or comics.
Primarily, at least, the plots associated with the game directly, but also all the prior lore, like the initial imprisoning of Deathwing, etc.