We Were Never Here by Andrea Bartz

In a gripping tale of friendship and suspense, two best friends, Emily and Kristen, embark on their annual exotic vacation, only for a night of celebration to turn deadly. When a backpacker ends up dead in their hotel room, Kristen claims self-defense, echoing a similar incident from the previous year. As Emily grapples with the chilling déjà vu and her growing unease about Kristen's version of events, she is torn between loyalty and the terrifying possibility that her friend might be hiding a dark secret. The novel explores themes of trust, guilt, and the complexities of female friendships, all set against the backdrop of a thrilling psychological mystery.