Higher Learning: This achievement requires you to read 8 books that all can be found within Dalaran. The 8 books you need to read are the following

The Schools of Arcane Magic - Introduction
The Schools of Arcane Magic - Conjuration
The Schools of Arcane Magic - Enchantment
The Schools of Arcane Magic - Necromancy
The Schools of Arcane Magic - Abjuration
The Schools of Arcane Magic - Divination
The Schools of Arcane Magic - Illusion
The Schools of Arcane Magic - Transmutation

These books are scattered all over Dalaran and It would take way to long to explain the location of them all. Luckily there is a video on Youtube to show you all of the locations to you, click here to view that video.