Holt of the Secret Service

When members of the nefarious crime syndicate KAOS attack the U.S. spy agency Control and the identities of secret agents are compromised, the Chief...

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...

When his longtime partner on the force is killed, reckless U.S. Secret Service agent Richard Chance vows revenge, setting out to nab dangerous...

Along with his new friends, a teenager who was arrested by the US Secret Service and banned from using a computer for writing a computer virus...

Japanese spies attempt to subvert America's war effort; G-Men attempt to thwart their plot.

Professor Campbell's expedition into the hills of Libya obtains a papyrus which might reveal the hiding place of the Golden Tablets of Hippocrates,...

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

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

A master thief coincidentally is robbing a house where a murder—in which the President of the United States is involved—occurs in front...

Lieutenant Commander John Byrne of the Naval Secret Service and his partner Pvt. Bill Riggers chase criminal Dr. Sin Fang, who is desperate to find a...

Secret Service agent Alex Thomas is detailed with protecting the president of the United States but, at a public appearance, everything went wrong...