Westerns:
- The Trail to Paradise (1928)
- The Rider of the Tumbling T (1929)
- Guns Along the Rio Hondo (1930)
Historical Novels:
- Banner of Blood (1931)
- The Iron Captain (1932)
- The Eagle and the Sword (1933)
Mysteries:
- Murder on the Blackboard (1934)
- Death in the Dressing Room (1935)
- The Clue of the Silver Dagger (1936)
Thrillers:
- Secret Agent X-1 (1937)
- The Invisible Terror (1938)
- The Man from Nowhere (1939)
Smith also wrote several series of books, including the Tex Wyatt Westerns, the Don Winslow detective novels, and the Doc Savage adventure stories.
In addition to his novels, Smith also wrote short stories, articles, and radio plays. He was a versatile and prolific writer who entertained millions of readers with his action-packed stories.