Top ranking whodunit in Dorothy Sayers tradition. Mr. Campion rides a merry-go-round while trying to figure out how a lovely actress manages to have opportune deaths remove the wrong men from her life. Campion's sister is implicated in the current husband's death. Ultimately, Campion catches his criminal in the act -- and almost loses his own life. Plus sale for non-mysteryites as first rate novel of fashionable London. Suspense -- humor -- well planned, well written.