The Grimrose Girls by Laura Pohl

After the mysterious death of their best friend, Ella, Yuki, and Rory are the talk of their elite school, Grimrose Académie. The police ruled Ariane's death as a suicide, but the trio is determined to find out what really happened.

When Nani Eszes arrives as their newest roommate, it sets into motion a series of events that no one could have predicted. As the girls retrace their friend's final days, they discover a dark secret about Grimrose - Ariane wasn't the first dead girl.

They soon learn that all the past murders are connected to ancient fairy-tale curses...and that their own fates are tied to the stories, dooming the girls to brutal and gruesome endings unless they can break the cycle for good.