As I Descended by Robin Talley
"Maria Lyon and Lily Boiten are their school’s ultimate power couple—but one thing stands between them and their perfect future: campus superstar Delilah Dufrey. Golden child Delilah is a legend at exclusive Acheron Academy, and the presumptive winner of the distinguished Cawdor Kingsley Prize. But Delilah doesn’t know that Lily and Maria are willing to do anything—absolutely anything—to unseat Delilah for the scholarship. After all, it would lock in Maria’s attendance at Stanford—and assure her and Lily four more years in a shared dorm room.
Together, Maria and Lily harness the dark power long rumored to be present on the former plantation that houses their school. But when feuds turn to fatalities, and madness begins to blur the distinction between what’s real and what’s imagined, the girls must attempt to put a stop to the chilling series of events they’ve accidentally set in motion."- summary from Amazon
A creepy, thrilling roller-coaster of a ride- I absolutely loved it and couldn't put it down. Loved all the GLBT representation in it too!! But Talley is not afraid to really go full-horror story in terms of character deaths.
FTC: Received ARC from publisher. Link above is an Amazon Associate link; any profit goes toward funding contests.