Mystery of the Riverboat

Dr. Mabuse and his organization of criminals are in the process of completing their latest scheme, a theft of information that will allow Mabuse to...

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...

Rosalind Joy is a constantly imperiled heiress to a fortune in gold. An 18 part adventure serial

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 train that is carrying the formula for a valuable form of granulated gasoline disappears before it reaches its destination. Railroad investigators...

A beautiful young woman is a daring master thief. She meets the young millionaire Thomas Babbington Norton, while fleeing from the scene of her...

Madge Clayton, a society girl, mysteriously disappears. The police suspect a master criminal is behind the girl's abduction, but her brother, Bob,...

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

A villain named Marlof attempts to set up secret missile bases inside Canada so he can launch missiles at the U.S. The Canadian Mounted Police...

Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden somewhere on land. In their efforts to find the...