The World of Warcraft: The Roleplaying Gamebook was the new core rule book created for the Warcraft RPG, to include second edition rules and move the series closer to the time frame of the World of WarcraftMMORPG. The book doesn't entirely replace the original core rule book, as it covers a separate time period in the Warcraft timeline and also contains new material related to a more recent point in history.
The earlier books in the series were known for having short stories, but unfortunately there are little or no short stories printed in the new series, with only the core rulebook containing a simple introduction to the book. This has since changed, as Alliance Player's Guide and Horde Player's Guide include several short stories.