Tailspin Tommy in The Great Air Mystery

The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the gold and become Emperor. Francisco was put in...

Adventures of an American Secret Service-girl in search of an important German secret during the war. Chapters: [1] “The Great Secret,”;...

Prof. Millard pretends to be dead and helps Jeff King ferret out Vulcan, the evil traitor at the science academy. Donning his Rocket Man costume King...

In this 12 Chapter serial the UN enlists trader Tom Rogers and Vivian Wells, to lead the effort to prevent the natives from starting a revolution in...

In Africa, a deceased medical missionary's daughter in Africa carries on her father's work. Before long, she finds herself in danger from crooks and...

A lady reporter and two college students search for the "Gold Special," a train that disappeared without a trace.

The Timber Queen follows Ruth Rowland as the inheritor of a wealthy timber business who tries to stay independent of a cruel man who wants to marry...

A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he helps Major Matling search Mayan ruins for hidden...

A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an army of robots based on his prototype to conquer...

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker wants to find the evildoer, among a host of...

Aimee is a young girl betrothed to a rascal, Hamid Bey. An American archeologist, Jack Ryder, arrives to help the girl escape ending up in Bey's...