The Master Key

Fireman Bob Darrow invents an original chemical fire extinguisher, and his rival, Dan Mitchell, for June Madison, also has his eyes on Bob's...

Science fiction serial.

An evil prince plans to use a super-explosive to take over the world.

The manager of The Big Circus plots to marry the owner's daughter and gain control of the outfit.

Spies from Japan conspire to steal the Channing "preparedness" fortune and invade the United States, beginning in New York, then allying themselves...

A murderous gang of counterfeiters has kidnapped the government's best engraver and is forcing him to print virtually undetectable phony money. The...

After being defeated in a fight by a local gang, local official Lu Fengyang sends his weak and sickly son Lu Xiaoqing to study with a master of the...

A Canadian Mountie and a young girl team up to prevent an evil couple from finding a fallen meteorite that contains a powerful element called...

About a young radio cop and a beautiful girl try to stop an international criminal gang from getting their hands on the formula for a new bulletproof...

Although ostensibly the grand-son of the legendary hero, Clayton Moore's Ken Mason is little more than a cowboy in a black mask in this 12 chapter...

On a scientific expedition to Siam young Billy Batson is given the ability to change himself into the super-powered Captain Marvel by the wizard...

Mary Brooks' father, who has been studying ancient tribes, falls into the hands of "the people of Zar, god of the Emerald Fingers." Tarzan helps Mary...