Gaudy Night (1935) is a mystery novel by Dorothy L. Sayers, the tenth featuring Lord Peter Wimsey, and the third including Harriet Vane. The dons of Harriet Vane's alma mater, the all-female Shrewsbury College, Oxford (based on Sayers' own Somerville College), have invited her back to attend the annual Gaudy celebrations. However, the mood turns sour when someone begins a series of malicious acts including poison-pen messages, obscene graffiti, and wanton vandalism. Despite the dons' reluctance to share the secret with an outsider, Harriet convinces them to let her bring in Lord Peter Wimsey to assist the investigation—but his involvement is not without complications, both personal and professional. Source: Wikipedia (en)