The third book in Andrew Taylor's acclaimed William Dougal crime series - from the Richard & Judy bestselling author of The American Boy. There's unfinished business between William Dougal and his widowed father. Part of it has to do with Celia Prentisse, William's ex-girlfriend. When her historian father is found drowned, it's declared suicide, but Celia remains unconvinced - not least because his abandoned clothes were found with a bottle of the wrong brand of gin and a slim volume of Schopenhauer's essays. It's not much evidence, but it's enough to send her godfather, retired British intelligence officer Major Ted Dougal, and his son William off on a trail that leads to a 1930s arsenic poisoning and a still-classified World War I court martial . . .