Dark Horse has released a preview of the World of Warcraft Chronicle Volume 1. Releasing on March, 15th, 2016 its a 184 page book with artwork and story elements of the game and its lore. The warcraft lore in huge and has been developed across 3 RTS games and the massive MMORPG World of Warcraft. There have also been 17 books and many short stories and even some comics that expand the lore even further.
If you are not knowledgeable about the Warcraft lore and want to get up to speed I’d recommend checking out this youtube video below. Nobbel87 has a entire channel dedicated to Warcraft lore. If your interested its definitely worth checking out.