Espionage

The Seven Conundrums

The Traitor's Gate

Jim Brent

Passers-By

A Killing for Christ

The Boomerang Circuit

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

The Gun-Runner

The presidential snapshot : or, The all-seeing eye

Hawaiian Sea Hunt Mystery: A Biff Brewster Mystery Adventure

In the tiger's lair

The Sea-girt Fortress

The Wire Tappers

The Message

The Way to Win

The Black Tiger

The Charlie Muffin Thrillers Volume Two

The Secret Dispatch; or, The Adventures of Captain Balgonie

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

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