So Kim and I just finished this achievement, Higher Learning. It offers a pretty cool reward of the Kirin Tor Familiar (one of the largest companion pets in game). If attempting to do this ach and you want to push through at once I recommend that you find a book and write down the time it spawned. All books spawn between 3-4 hours after they despawn. Once read they will despawn after 3 minutes so it really is a camping game. We started Friday night and it took us until Sunday night at 10 to finally get them all. Linked is the guide.