"The Uninvited Guests" is a novel by Sadie Jones that explores themes of class, family, and the impact of unexpected events. Set in the early 20th century, the story revolves around the Cloisters, a wealthy family preparing for a birthday celebration when a group of uninvited guests arrives, disrupting their plans and revealing hidden tensions. As the evening unfolds, the characters confront their secrets and desires, leading to a mix of humor and drama. The novel examines how the presence of strangers can challenge social norms and force individuals to confront their true selves amidst the chaos of the unexpected.