Espionage

The Boomerang Circuit

The Gun-Runner

The presidential snapshot : or, The all-seeing eye

In the tiger's lair

The Black Tiger

The Charlie Muffin Thrillers Volume Two

The Secret Dispatch; or, The Adventures of Captain Balgonie

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

Rescuing the Czar

Hawk Eye

Spies and Secret Service

The Mandarin's Fan

Thank You, Mr. Moto

The Stolen Cruiser

Mystery of the Caribbean Pearls

Agent Nine and the Jewel Mystery

Four Years a Scout and Spy “General Bunker”

Dave Dawson with the Commandos

Watching on the Rhine

The long patrol