This book contains all of the prequels for the Ever After High series, plus The Tale of the Two Sisters (which comes up later in the series). Each prequel sets up the character's conflict before their Legacy Year.
The characters included are Briar, Apple, Hunter, Ashlynn, and Raven, whose stories are included in the free ebooks, as well as new stories for Cedar Wood, Dexter and Darling Charming, Lizzie Hearts, and Kitty Cheshire.
I thought the stories were all very good, much better than I thought they would be. Cedar Wood's was probably my favorite because of its focus on bullying and highlighting the skills of the differently abled. Kitty Cheshire's was also very cool, because of her interaction in all of the stories.
A very interesting look behind-the-scenes before the official series starts.