• Red River Valley
• Lost Bonanzas: True Stories of Buried Treasure and Lost Mines of the American West
• Outlaws on Horseback: The History of the Organized Bands of Bank and Train Robbers Who Terrorized the Prairie Towns of Missouri, Kansas, Indian Territory, and Oklahoma for Half a Century
• The Great Range Wars: Violence on the Grasslands
• Notorious Ladies Of The Frontier
• Great American Cattle Trails: The Story of the Old Cow Paths of the East and the Longhorn Highways of the Plains
• The Legend Makers: Tales of the Old-Time Peace Officers and Desperadoes of the Frontier
• Pay-Off at Black Hawk
• The Steamboaters; From the Early Side-Wheelers to the Big Packets
• River of Gold
• Out of the Silent North
• Trigger Gospel
• Road Agents And Train Robbers; Half A Century Of Western Banditry
• Whispering Sage
• Guardians of the Sage
• Wild, Woolly & Wicked: The History of the Kansas Cow Towns And the Texas Cattle trade
• Where the Loon Calls
• Canal Days In America; The History And Romance Of Old Towpaths And Waterways
• Lost Bonanzas: Tales of the Legendary Lost Mines of the Old West
• Suzanna: A Romance of Early California
• Laramie Rides Alone
• Montana Road
• Lone Wolf of Drygulch Trail/More Precious Than Gold
• Following the Grass
• This Way to Hell (1933) writing as Stewart Cross.
• The Loner (1956) writing as Bliss Lomax

Screenplay Novelizations (all published by A. L. Burt, circa 1929–1932):

• The Champ
• Madam Satan
• Rio Rita
• The Singer of Seville (alternate title for Call of the Flesh)
• The Trespasser

Drago's papers are at Syracuse University.^[2]

• Harry Sinclair Drago at IMDb