The Secret of the Submarine
The Black Secret
Haunted Island
When Rogues Fall Out
The Great Alone
The Spider Returns
Hell-Bent for Heaven
Holt of the Secret Service
Battling Brewster
The Brass Bullet
A Plunge from the Sky
Black Gold
Fire and Steel
The Jaws of Steel
The Midnight Watch
Elmo, the Mighty
The Operator at Black Rock
A Plucky American Girl
