Learn the history of Princess Celestia and Princess Luna by reading the diary they kept when they were younger. PLUS, hidden inside, readers will discover the pages of a bonus book - The Journal of Friendship. Inspired by Celestia and Luna, the pony friends Princess Twilight Sparkle, Pinkie Pie, Rainbow Dash, Fluttershy, Rarity and Applejack share a diary of their own! Read their entries - as seen on the show - and then write some of your own friendship observations in the book, too!