- (1911) Novel: "Cynthia-of-the-Minute" (filmed as Cynthia of the Minute (1920)).
- Novel: "The Last of the Fighting Channings" (filmed as Patria (1917)).
- (1918) Novel: "The False Faces" (filmed as The False Faces (1919)).
- (1921) Novel: "Alias the Lone Wolf" (filmed as Alias the Lone Wolf (1927))
- (1908) Novel: "The Black Bag" (filmed as The Black Bag (1922)).
- (1914) Novel: "The Trey O' Hearts" (filmed as The Trey o' Hearts (1914)).
- (1934) Novel: "The Street of Strange Faces".
- (1934) Novel: "The Lone Wolf's Last Prowl" (aka "The Last Prowl").
- (1930) Novel: "The Woman in the Shadow".
- (1932) Novel: "Detective".
- (1914) Novel: "The Lone Wolf" (filmed as The Lone Wolf (1954), The Lone Wolf (1917), The Lone Wolf (1924)).
- (1923) Novel: "The Lone Wolf Returns" (filmed as The Lone Wolf Returns (1926), The Lone Wolf Returns (1935)).
- (1923) Novel: "The Destroying Angel" (filmed as Destroying Angel (1923)).
- (1923) Novel: "Baroque: A Mystgery" (aka "Double Doom").
- (1933) Novel: "Encore the Lone Wolf".
- (1926) Novel: "The Dead Ride Hard".
- Novel: "As the Crow Flies" (filmed as As the Crow Flies (1914)).
- (1920) Novel: "The Dark Mirror" (filmed as The Dark Mirror (1920)).
- (1931) Novel: "The Lone Wolf's Son"
- (1921) Novel: "Red Masquerade: Being the Story of The Lone Wolf's Daughter" (filmed as The Lone Wolf's Daughter (1919), The Lone Wolf's Daughter (1929)).
- (1925) Novel: "The Dark Power".
- (1913) Novel: "Joan Thursday" (filmed as The Footlights of Fate (1916)).
- Novel: "Secrets of the Lone Wolf" (filmed as Secrets of the Lone Wolf (1941)).
- Novel: "Stalemate" (filmed as Stalemate (1914)).
- Novel: "Flower of the Flames" (filmed as Flower of the Flames (1914)).
- (1923) Novel: "Mrs. Paramor" (filmed as Married Flirts (1924)_).
- (1913) Novel: "The Day of Days" (filmed as The Day of Days (1914)).
- Novel: "The Crack o' Doom" (filmed as The Crack o' Doom (1914)).
- (1910) Novel: "No Man's Land" (filmed as No Man's Land (1918)).
- Novel: "The Last Trump" (filmed as The Last Trump (1914)).
- Novel: "Steel Ribbons" (filmed as Steel Ribbons (1914)).
- Story: "Beau Revel" (filmed as Beau Revel (1921)).
- Story: "First Cabin" (filmed as Cheaters at Play (1932)).
- Novel: "Dead Reckoning" (filmed as Dead Reckoning (1914)).
- (1907) Novel: "The Brass Bowl" (filmed as Masquerade (1929), The Brass Bowl (1914), The Brass Bowl (1924)).
- Story: "The Mainspring" (filmed as The Mainspring (1917)).
- (1912) Novel: "The Bandbox" (filmed as The Bandbox (1919)).
- (1909) Novel: "The Pool of Flame" (filmed as The Pool of Flame (1916)).
- Novel: "The Sea Venture" (filmed as The Sea Venture (1914)).
- Novel: "The Jaws of Death" (filmed as The Jaws of Death (1914)).
- (1915) Novel: "Nobody" (filmed as The Outsider (1917)).
- Novel: "White Water" (filmed as White Water (1914)).
- Novel: "The Sunset Tide" (filmed as The Sunset Tide (1914)).
- Playwright: "The Spanish Jade" (filmed as The Spanish Jade (1922)).
- Novel: "The Mock Rose" (filmed as The Mock Rose (1914)).
- Novel: "The Mirage" (filmed as The Mirage (1914)).
- Novel: "The First Law" (filmed as The First Law (1914)).
- (1931) Novel: "The Trembling Flame".
- (1909) Novel: "The Bronze Bell".
- (1927) Novel: "They Call It Love".
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