Eagles of the Sky; Or, With Jack Ralston Along the Air Lanes

The Sky Pilot's Great Chase; Or, Jack Ralston's Dead Stick Landing

The Sky Detectives; Or, How Jack Ralston Got His Man

Wings Over the Rockies; Or, Jack Ralston's New Cloud Chaser

Flying the Coast Skyways; Or, Jack Ralston's Swift Patrol

Whig Against Tory

Or, The Military Adventures of a Shoemaker, a Tale of the Revolution

The Radio Boys on Secret Service Duty

The Red Room

A Rogue by Compulsion

An Affair of the Secret Service

The Return of Clubfoot

The German Spy System from Within

John Dene of Toronto

A Comedy of Whitehall

The Man with the Clubfoot

The German Spy in America

The Secret Plotting of German Spies in the United States and the Inside Story of the Sinking of the Lusitania

Trackers of the Fog Pack; Or, Jack Ralston Flying Blind

Fighting Germany's Spies