Riley Sager

Riley Sager is the pen name of Todd Ritter, an American author who grew up in Pennsylvania and now lives in Princeton, New Jersey. Before fiction took over entirely, Ritter spent years working as a journalist, editor, and graphic designer — a background that sharpened both his eye for detail and his instinct for pacing. The pseudonym was a deliberate fresh start: after publishing crime novels under his real name and one under the pen name Alan Finn, Ritter and his agent concluded that a new identity would give him the clean slate that the publishing industry often rewards.

That gamble paid off spectacularly. His debut as Riley Sager, Final Girls (2017), announced a singular voice in commercial thriller fiction. The novel won the ITW Thriller Award for Best Hardcover Novel and drew immediate comparisons to the psychological suspense of Gillian Flynn — with Stephen King calling it one of the first great thrillers of 2017. It introduced what would become a signature approach: a contemporary thriller that wears its genre influences openly, then uses reader familiarity against them.

Each subsequent novel has been a standalone, and Sager has been unusually consistent at making that format work. The Last Time I Lied (2018) leaned into the sinister dynamics of a summer art camp. Lock Every Door (2019) mined the claustrophobic unease of a grand, secretive Manhattan apartment building. Home Before Dark (2020) played with the conventions of the haunted house memoir, setting its protagonist against a childhood she was too young to remember properly. Survive the Night (2021) stripped the action back to a single car journey set against a 1991 backdrop of true-crime paranoia and Nirvana tapes.

The House Across the Lake (2022) marked something of a pivot — blending voyeurism, psychological suspense, and a supernatural undercurrent that surprised readers who expected a more grounded thriller. The Only One Left (2023) pushed further into Gothic territory, drawing on the Lizzie Borden mythos to construct a dual-timeline story about a mute elderly woman and the home-health aide helping her document a decades-old family massacre. Its atmosphere — crumbling clifftop mansion, antique typewriter, secrets communicated letter by letter — was among the most fully realised settings of his career.

Middle of the Night (2024) returned to suburban unease, centring on a man who witnessed his childhood best friend's disappearance from a garden tent and must now confront the possibility that the past hasn't stayed buried. With a Vengeance (2025) shifted to a 1950s luxury overnight train, drawing direct comparisons to Agatha Christie's locked-room traditions with its tale of a woman who has lured the people who destroyed her family into an inescapable space.

Across ten novels, Sager has developed a recognisable but never repetitive formula: settings that function almost as characters in themselves, unreliable perspectives, and a willingness to incorporate supernatural suggestion even in stories that ultimately remain grounded. His protagonists tend to be people carrying a specific wound — grief, trauma, a half-remembered event — that the plot methodically reopens. The twists, when they arrive, tend to reframe rather than simply surprise, asking readers to reassess what they thought they understood about characters they believed they knew.

With over 5 million copies sold and publication in more than 40 countries, Sager has become one of the most reliably read voices in contemporary psychological suspense. A new novel, The Unknown, is scheduled for August 2026.