I just got done reading this. If you have ever played any type of pen and paper RPG or had any sort of nerdy obsession in school that everyone thought was crazy, you need to read it too. It's amazing so far. That and a completely crazy cutie mark origin story buried within.
Anyway, have some links:
Digital
Comixology
iTunes
Variants (Images in order from right to left, top to bottom)
Cover A
Cover B
Retail Incentive
Hot Topic Cover
Larrys
Jetpack
Awesome Conventions (I can't find a place to buy it, website is there though)
New York Comic Con Comics World Exclusive
