Twilight has been sent a new shipments of books from Celestia. This isn't strange, she usually gets new book shipment every week. What is strange, however, is that the Princess asked Twilight to read a particular one first, while giving a cryptic message that it is somthing she needs to know.
This story is all about the creation of Equestria as a whole, and does use OC characters for the roles.
Please note, this was mostly written just before season 2 started.

Cover art belongs to johnjoseco