CW Cooke 
Baneberry Creek: Academy for Wayward Fairies #3 [EPUB ebook] 

Something horrible is on its way to Baneberry Academy, but before it can get there, the girls get to have a dance with the boys school! We cast our light down on Sierra this time and what it means, for her, to be a fairy. She’s had a rough life, and coming to Baneberry has been a dream come true. But, as the dance rears its ugly head and Sierra can’t find a date, she’s forced to make a bad decision that might affect all of the school.