The Woman in Cabin 10 is a gripping psychological thriller by internationally bestselling author Ruth Ware, first published in 2016. The novel follows Lo Blacklock, a travel journalist who lands the assignment of a lifetime: a week aboard the exclusive Aurora, a luxury cruise ship sailing the North Sea with only a handful of guests. What begins as an elegant getaway quickly turns sinister when Lo witnesses what appears to be a woman being thrown overboard from the neighboring cabin — Cabin 10. When the ship's manifest shows all passengers accounted for, no one believes her, and Lo is left to unravel a terrifying mystery entirely on her own.

A New York Times and USA Today bestseller, The Woman in Cabin 10 is a taut, atmospheric thriller perfect for fans of Gone Girl and The Girl on the Train. Ruth Ware masterfully builds tension against the claustrophobic backdrop of an isolated ship at sea. The book was nominated for a Goodreads Choice Award for Best Mystery & Thriller in 2016 and has sold millions of copies worldwide. A film adaptation was released in 2025.