Final Girls (2017) by Riley Sager is an intense, fast-paced psychological suspense. Quincy is a "final girl," the only survivor of a college camping trip gone wrong. 10 years later, when another "final girl" who survived her own horror story, Lisa, is found dead, Quincy reconnects with Samantha, a third "final girl" who is just as interested/horrified to learn of Lisa's fate. Together, they try to unravel Lisa's death, nurture a budding friendship, and unpack years of psychological trauma. Good suggestion for readers who are interested in unreliable narrators, multiple perspectives, the "final girl" trope, and who don't mind violence.
For similar reads check out our lists for Domestic Thrillers and Thrillers and Suspense.