While re-shelving books at the library, Twilight discovers a journal she gave to Spike years ago contains stories about the great dragon hero Captain Invincible, who fights for Truth, Justice, and the Equestrian Way, defending the city of Ponytopolis from the diabolical Dr. Spectra and other assorted dangers.
There's just two problems: Spike clearly wanted the stories to be kept private, and Twilight just can't stop reading them.
Featured on Equestria Daily on 3/4/2013