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Nine books have been listed by Blizzard as part of the Warcraft, later World of Warcraft, tabletop role-playing games. While they have been recommended on the WoW website as providing "a wealth of information about Warcraft lore", Community Manager "Bashiok" later stated that these books sometimes diverge from the established canon of lore in the Warcraft video games, though some ideas originating in the RPG books have made their way into the official Warcraft canon.
Second Edition
In 2005, a second edition of the game rules called World of Warcraft: The Roleplaying Game was released, renamed to tie in with the success of World of Warcraft. In "translating" WoW into a tabletop experience, this project sought to break the limitations of the computer-programmed Azeroth, in ways such as giving players the ability to complete quests with their own imagined methods and to change the inherent setting of the game with their own ideas.
Bashiok (June 23, 2011). "Ask Creative Development -- Round II Answers". World of Warcraft. Archived from the original on December 13, 2015. The RPG books were created to provide an engaging table-top role-playing experience, which sometimes required diverging from the established video game canon. Blizzard helped generate a great deal of the content within the RPG books, so there will be times when ideas from the RPG will make their way into the game and official lore, but you are much better off considering the RPG books non-canonical unless otherwise stated.