Riley Sager's 'Final Girls' is a clever psychological thriller that deconstructs the horror movie trope of the lone female survivor while delivering genuine scares and twists. The story follows Quincy Carpenter, one of three women dubbed 'Final Girls' by the media after surviving separate mass killings. When fellow survivor Lisa dies by apparent suicide and the enigmatic Sam—the first Final Girl—suddenly appears at Quincy's door, Quincy's carefully medicated and controlled life begins to unravel.

This book excels at atmosphere and pacing, building tension through Quincy's unreliable narration and fragmented memories of the night her friends died at Pine Cottage. Sager skillfully weaves between past and present, gradually revealing the truth behind the massacre while exploring themes of trauma, survival guilt, and media exploitation of tragedy. The horror movie references feel organic rather than gimmicky, and the book works both as a thriller and as commentary on how society mythologizes victims.

Quincy is a compelling but frustrating protagonist—her pill-popping, wine-drinking attempts to numb her past make her sympathetic, but her passive nature can test readers' patience. Sam serves as an effective foil, representing the rage and defiance Quincy has suppressed. The supporting cast, including Quincy's boyfriend Jeff and the investigating officer Coop, feels somewhat underdeveloped.

The book's greatest strength is its final act revelation, which recontextualizes everything that came before, though some readers may find the twist either brilliant or manipulative depending on their tolerance for unreliable narrators. The writing is crisp and accessible, making complex psychological themes digestible without dumbing them down.

'Final Girls' is perfect for readers who enjoy psychological thrillers with horror elements, fans of Gillian Flynn's twisty narratives, and anyone interested in stories that examine trauma and memory. Skip it if you prefer straightforward mysteries, dislike unreliable narrators, or are sensitive to graphic violence and sexual assault themes. While not groundbreaking, it's a solid, entertaining thriller that respects both its genre roots and its readers' intelligence.