The Living Shadow
Author: Walter B. Gibson Series #: 001 Published: April 1, 1931: Bantam #1, Pyramid #1, Sanctum Books #47
Eyes of the Shadow
Author: Walter B. Gibson Series #: 002 Published: July 1, 1931: Bantam #2, Sanctum Books #48
The Shadow Laughs
Author: Walter B. Gibson Series #: 003 Published: October 1, 1931: Bantam #3, Sanctum Books #49
The Red Menace
Author: Walter B. Gibson Series #: 004 Published: November 1, 1931: Pyramid #7, Sanctum Books #91
Gangdom's Doom
Author: Walter B. Gibson Series #: 005 Published: December 1, 1931: Bantam #7, Sanctum Books #101