Of the 26 detective stories in the April-May crop, the following stood out as best bets:
THE PROBLEM OF THE GREEN CAPSULEJohn Dickson CarrHarper ($2). A man is poisoned in the presence of three witnesses, none of whom can tell what happened. But ingenious Dr. Fell catches the culprit. Intricate and astute.
JUDAS, INCORPORATEDKurt SteelLittle, Brown ($2). While tracking down the murderer of a Connecticut industrialist, case-hardened Hank Hyer comes between two rival strikebreaking agencies. Tops for the tough type.
RENO RENDEZVOUS Leslie Ford Farrar & Rinehart ($2). Two daring and...