Giles Questing, an undergraduate student at the University of Oxford, finds his life taking an unexpected turn after the suspicious death of a PhD student, a death the police believe to be suicide. He determines to solve the mystery by following a trail of artworks that depict a unicorn. Travelling to museums and galleries, he gradually discovers the truth about whether the student has taken his own life or been murdered, and who – if anyone – is guilty. His quest immerses him in the world of...