Serious World of Warcraft gamers have an affinity for either griding or questing. So it stands to reason you would want a guide to reflect your particular affinity.

My nephew prefers quests, and he uses joanas guide to help him through his quests. He tries to avoid the grind so to speak) as much as possible. He told me that the guide had a recent update including something about how to level blood elves and outland leveling info, and free updates for future expansions and patches.

I may not know a lot about this game, but I overhear a lot from my family members who play, and this is the guide for a quest fan.