Lulu:

You are ordering a most peculiar book. Some would call it a writing manual. Some would call it a system of philosophy illustrated with ponyfics. Some would call it the delusional ravings of a crackpot. But it is definitely 54 stories, scripts, and poems, and 25 essays (21 new for this book) on writing, art, history, and why everything is Plato’s fault, by the ever-unpredictable Bad Horse.

[Paperback] [Hardcover]

The book also includes:
The stories:

• "A Carrot for Miss Fluttershy", which is available on fimfiction, but not listed as a story because it's a script
• "Think Inside the Box", a New 6 script that has never been posted anywhere
• "Celerity": not the 900-word version in "The Twilight Zone", but a 2300-word version with a different ending
• Twenty-one essays not found on the site
• The first three chapters of Bad Horse's Bedtime Stories for Impressionable Young Filles and Colts
• A Beautiful Night from Twinkie
• Both chapters from Sisters
• And The Pony, The Mechanical Donkey, Fraud, The Green Hills of Equestria, Loyalty, Worth It, Happy Thoughts, The Element of Audacity, The Quiet One, The Gentle People, Shipping Costs, Queen of Foals, and Game of Immortals

which can be all found as their own chapters in the story The Twilight Zone.

[Blog for more details and a table of contents]