It's been a very long time since I read any of Dorothy Sayer's Lord Peter Wimsey books. Clouds of Witness is the second in terms of chronology; properly speaking, it should be preceded by Whose Body?. All of the Whimsey novels and short stories are set between the end of World War I, and the start of World War II. They involve the solving of mysteries, usually a murder, by British aristocrat and amateur sleuth, Lord Peter Wimsey. Sayers in an interview once described Wimsey as a cross between Fred Astaire and Bertie Wooster, from P. G. Wodehouse's novels.