Did you ever wonder why Rainbow Dash had a rainbow mane and nobody else did?
Maybe it never crossed your mind that a rainbow is more than a superficial trait.
A little while after Rainbow fails her Wonderbolt audition, her friends begin to notice that her iconic rainbow mane and cyan coat are literally leaking color, leaving behind a shallow, lifeless shell of what Rainbow Dash used to be.
Without the old Rainbow Dash, everything seems to be thrown out of balance in Equestria, and the elements of harmony can't function. Together, they attempt to bring back color to the one they care for he most.
Through medical study and the magic of friendship, Equestria will finally understand Rainbow Pegasus ponies, and the existence of rainbows entirely.

My papa is celebrating his birthday! I CAN'T WAIT! I've got my saddlebag all packed and ready to go! I've got a LONG hike ahead of me! Twily was confused why I wanted to go alone and by hoof. That silly little pony! I told her that 1.) My family's house isn't big enough!..and my sis is very, very shy around new ponies (like Fluttershy!) and 2.) I know that trail like it's the left side of my cutie mark! Twilight should have nothing to worry about!

This was the first entry of Pinkamena Diane Pie's travel journal. It was recovered by the Royal Equestrian Air Force after it was found 10 meters down an obscure hole on an unmarked trail.

Inside is a first-hoof account of her struggle to survive the 5 days without any food or company.

Narrative told in both first-person (Pinkie Pie's journal in italics) and third-person.

Inspired by 127 Hours, Into the Wild, and personal experiences.

Rated Teen for strong language and disturbing scenes.

More popular than the "Celestia's Homecare" omnibus, better selling than "Fifty-Three More Things to do When Trapped on the Moon", and more controversial than the infamous "Cupcakes", how does the story of this remarkable book differ in a universe full of... pony?

After escaping the destruction of Equestria at the hands of some big ol' meanies, Pinkie Pie leads her friends on a series of baffling, mind boggling and downright nonsensical adventures through a galaxy where harmony is in short supply, but aliens, monsters and chaos are most definitely not.

Gasp! As they meet strange alien creatures!
Cry! As emotional torment assails our characters!
Groan! As the Author includes yet another 4th wall break!

And most importantly, DON'T PANIC