SECRET AGENT "X", July 1935

THE GOLDEN GHOUL by Brant House
SIGNAL FOR MURDER by Anson Hard
IN STEP WITH DEATH by Edward P. Norris

Pulp Sized Magazine:
7 x 10 inch
132 pages
$14.95

SECRET AGENT "X", June 1937

SLAVES OF THE SCORPION by Brant House
DEATH DUMMY by Belton O. Buck
DEPARTMENT OF MURDER by Charles Marquis Warren
DOUBLE TROUBLE by Walter Walker
DOOM ON WHEELS by Dale Clark
SHORT-CUT TO JUSTICE by Ralph Franklin

Pulp Sized Magazine:
7 x 10 inch
116 pages
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SECRET AGENT "X", October 1937

THE ASSASSINS' LEAGUE by Brant House
BAFFLING DISGUISES by Elliott B. Hensel
DETOUR TO MURDER by Frank Gruber
SQUARE-SLUG RETRIBUTION by William Benton Johnston
HE DIED 100,000 YEARS AGO by H. M. Appel
PISTOL PARDON by Don Cameron
REPLY TO SATAN by Ralph Franklin

Pulp Sized Magazine:
7 x 10 inch
132 pages
$14.95