All throughout time many spirits have roamed the lands, seas, or skies of Earth, whether they be good or evil. This book is the ultimate guide on the spirit's history and achievements, from their birth or creation, to their death or imprisonment.

This is the book Twilight finds in her library in my story "The Spirits of Equestria" and uses to learn about the history of the mysterious Aeolus. In my story they only read a few pages, here, Twilight begins to read the entire book with Spike.
(Taking place during chapter 4 of The Spirits of Equestria)