ASK A POLICEMAN—John Rhode, Helen Simpson. Gladys Mitchell, Dorothy L. Sayers, Anthony Berkeley, Milward Kennedy—Morrow ($2). With the aid of an ingenious setting—the murder of a belligerent newspaper publisher—four famed members of the Detection Club trade characters to make fit fare for post-graduate mystery readers.
THE ALBUM—Mary Roberts Rinehart —Farrar & Rinehart ($2). Murder in a sequestered group—and a prying spinster finds romance while solving the crime.
OBELISTS AT SEA—C. Daly King— Knopf ($2). Gangsters and robbery, shooting and poison, autopsy and body-stealing on a great Atlantic liner make adequate background for the mental and physical activities of leading exponents of four schools of psychology.
THE STRANGE CASE OF PETER THE LETT —Georges Simenon—Covici, Friede ($2). Inspector Maigret, mystified by duplex identity, spurred by sorrow, exhibits super-human activity, and bags his man.
THE WORLD'S FAIR MURDERS—John Ashenhurst—Houghton Mifflin ($2). By a trick of legerdemain, a man murders in view of 10,000 witnesses. A smart young reporter discovers how it was done, and by whom; scores a scoop.
THE BROKEN 0—Carolyn Wells—Lip-pincott ($2). A graphology lead brings Fleming Stone to the explanation of an apparently natural death.
A CASE FOR MR. PAUL SAVOY—Jackson Gregory—Scribner ($2). Calculating probability of circumstance, the investigator finds the cause of a naked corpse.
HE ARRIVED AT DUSK—R. C. Ashby— Macmillan ($2). A poltergeist that kills, so disturbs a young Londoner that his detective friend lays the ghost.