Espionage

The Mandarin's Fan

The Young Wireless Operator—With the U. S. Secret Service

The Gun-Runner

The presidential snapshot : or, The all-seeing eye

In the tiger's lair

The Gregory circle

The Boomerang Circuit

The Grey Lady

The Peddler Spy; or, Dutchmen and Yankees. A Tale of the Capture of Good Hope

A Killing for Christ

The Reckoning

Spies of the Kaiser: Plotting the Downfall of England

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

Staccato Passage

Graveyard of Spies

Black Flag

Weaponized

The Citadel

Days of Danger

Whirlwind