The Housemaid Assortment is a collection of bestselling psychological thriller books by Freida McFadden. This series follows Millie, a young woman who takes a maid job in a wealthy household, only to uncover dark secrets while hiding her own troubled past. The collection includes The Housemaid, The Housemaid's Secret, The Housemaid's Wedding, and The Housemaid Is Watching.

Known for their gripping twists and easy-to-binge quality, these novels have been described as "popcorn thrillers" that readers often finish in just a few days. Each book features shocking, unexpected plot developments that keep readers engaged throughout. The series has gained massive popularity, with a major motion picture adaptation directed by Paul Feig and starring Sydney Sweeney and Amanda Seyfried released in December 2025.