Beginner's Guide to Dimensional Rifting Ch. 2 - Holy Places to Many
Beginner's Guide to Dimensional Rifting Ch. 2 - Holy Places to Many is a book object that can sometimes be found atop an ancient night elf tower at Temple of a Thousand Lights in Azsuna.[55.0, 71.4]
It requires having purchased and used 
[Beginner's Guide to Dimensional Rifting].
<Penned by the skilled hand of Mentithus Leytracker>
Many of the civilized races of Kalimdor congregate near powerful Ley Line nexus'. Based on my studies there is a natural pull for many of the denizens of this world.
In your travels you will encounter many temples, ruins, or cities located along the Ley Lines. These are also often good points to become more familiar with the art.
Take heed though, not all peoples will be happy with you treading on what they believe to be sacred ground. And living too near some Ley Lines make denizens even more dangerous.
Criteria of
Patch changes
Patch 7.0.3 (2016-07-19): Added.