The Block Party is a domestic suspense novel by Jamie Day, published by St. Martin's Press (Macmillan). Set on the exclusive cul-de-sac of Alton Road, the story opens at the annual Memorial Day block party where a murder occurs. The narrative then rewinds one year, unraveling the rivalries, betrayals, and scandals hidden beneath the neighborhood's picture-perfect facade.

Told through two perspectives — Alex, a well-meaning but flawed mediator and mother, and her eighteen-year-old daughter Lettie — the novel explores themes of suburban secrets, family dynamics, and the dangers lurking behind closed doors. At 384 pages, it blends elements of domestic thriller and mystery in the vein of Big Little Lies and Desperate Housewives. First published July 18, 2023.