CW Cooke 
Baneberry Creek: Academy for Wayward Fairies #4 [EPUB ebook] 

Kraken stands revealed, and it’s time for war! The Academy is under siege from the evil Kraken, who has been pulling strings from behind the scenes since before the girls met. We also take a closer look at Gloss, the loner of the group. The strongest and most mysterious of the group, Gloss has been hiding a secret from the others, something that might just tear them apart, right when they need to be their strongest. Horrible things have happened to the other girls, and Gloss has to make a choice. Will she save them? Find out here!