The book was Twilight Sparkle's greatest creation – ask it any question about how your life might have been and see the answer. It is a work of genius. It is a tempting, insightful, wonderful marvel of magic. It is a terrible mistake.
When Twilight is thrust into a world of horrifying abominations, terrors she can't begin to imagine, and a never-ending fear of what's behind that corner, she's forced to survive in a world which wants nothing more than to see her die.