When a scheming young stockbroker is murdered--in a delicious locked-room scenario based on a real case of the day--Vance steps in to solve the puzzle not merely because he is bored and seeking new entertainment, but also because honor compels him to point out all the ways in which the police are getting it wrong. The cops of course are profoundly grateful, like all members of the lower orders when their mistakes are pointed out. Peter Wimsey would be appalled, but the reader will be delighted. Philo Vance (here in his first outing) is the sleuth you love to hate.