Book excerpt: From award-winning mystery writer Robert Barnard comes a classic British whodunit about a bestselling author who is murdered—and his latest unpublished manuscript has gone missing. Sir Oliver Fairleigh-Stubbs, overweight and overbearing, collapses and dies at his birthday party while indulging his taste for rare liquors. He had promised his daughter he would be polite and charitable for the entire day, but the strain of such exemplary behavior was obviously too great. He leaves a family relieved to be rid of him, and he also leaves a fortune, earned as a bestselling mystery author. But the manuscript of the unpublished volume left to Sir Oliver’s wife, a posthumous “last case” that might be worth millions, has disappeared. And Sir Oliver’s death is beginning to look less than natural.