Gaudy Night (Lord Peter Wimsey, #12)

The dons of Harriet Vane's alma mater, the all-female Shrewsbury College, Oxford, 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. Harriet asks her old friend Wimsey to investigate.