The Broken Mirror by Melissa de la Cruz

The Never After crew is back for another twisted adventure. This time, they’re off to Snow Country—that is, after they rescue the beleaguered Lord Sharif of Nottingham from the evil Robin Hood, who has been plaguing the land with his thievery and mischief.
But Robin’s antics aren’t the only dangers afoot in the Kingdom of Never After. At the behest of her daughter, the evil Cinderella, Queen Olga has turned Prince Charming into a Frog after his wedding to the beautiful Hortense. And how could we forget the ominous Prophecy, which still looms large over Filomena and her friends?
Along with Jack, Alistair, Gretel, Beatrice, Byron Bessley, and some new Snow Country pals like Rose Red and a chatty magic mirror, Filomena sets off to find the only ones who can save the kingdom once and for all: The League of the Seven – a group of fearless warriors devoted to fighting the ogres at any cost.
Still, new threats lurk around every corner, both in Never After and back home in North Pasadena . . . Even with the League of the Seven’s help, can Filomena and her friends rescue the land from Olga’s clutches? Or will the ogres finally prevail?