The Pegasus Prophecy: Evil of the Sky
From Equestripedia, the Archives of Equestria!
The Pegasus Prophecy: Evil of the Sky is a book written about the supposed "evil" of the Pegasus race. The author is currently unknown though is likely of either Earth Pony or Unicorn descent, likely the latter given its presidence in Canterlot. The book was featured in the Dark Magic wing of the Royal Library.