Riders of Death (1944)
     aka Cottonwood Pards
The Man from Texas (1945)
Texas Talbert (1945) (writing as Lee Thomas)
Saddle Pals (1947)
Hangman's Range (1947)
Guns of Powder River (1947)
Texas Cowman (1947) (writing as Lee Thomas)
Dusty Boots (1950) (writing as Lee Thomas)
Double Cross Ranch (1950)
Riders in the Night (1950)
This Grass Is Mine (1950)
The Trail North (1950)
Deadly Draw (1951)
     aka Two-Gun Trail
Guns of Wyoming (1951)
Black Gunsmoke (1951)
Milk River Range (1951)
Wolf Dog Range (1951) (writing as Will Watson)
Raiders of White Pine (1951) (writing as Lew Smith)
Rimrock Renegades (1951)
War On Alkali Creek (1951) (writing as Will Watson)
Renegade Riders (1952)
Ambush Trail (1952)
Four Texans north (1953)
Hell's Homestead (1953)
Sonora Stage (1953)
Wild Border Guns (1953)
     aka The Outlaw Breed
Wolf Dog Town (1953) (writing as Lee Thomas)
Freight for the Little Snowies (1953)
Muddy Wheels (1953)
North to Wyoming (1953) (writing as Will Watson)
Rimrock Raiders (1953) (writing as Lew Smith)
Wind River Range (1953)
The Wyoming Rustlers (1953)
Smoky River (1954) (writing as Lew Smith)
Law of the West (1954)
Rifles on the Rattlesnake (1954)
Boothill Court (1954) (writing as Lew Smith)
Gambler's Guns (1954) (writing as Lee Thomas)
Broken Horn (1954)
Pistol Partners (1954)
Powdersmoke Canyon (1954)
Trail's End (1954)
Winter Kill (1954) (writing as Len Turner)
Hammerhead Range (1955)
Texas Medico (1955) (writing as Len Turner)
Ramrod (1955) (writing as Lew Smith)
Wait for the Day (1955)
Trail to High Pine (1956)
Dusty Wheels (1957) (writing as Lew Smith)
Rifle Law (1958)
Jill's Hollywood Assignment (1958)
Guns Along the Pecos (1959)
Winchester War (1960)
Renegade Gambler (1961)
John Wesley Hardin, Texas Gunfighter (1962)
The Last Gun (1962)
Montana Maverick (1962)
Guns on Circle S (1962)
High Thunder (1962)
The Last Freighter (1962)
Gunslammer (1963)
Two Guns North (1963)
Hollywood Nurse (1963)
Two Riders North (1963)
Deputy's Revenge (1964)
Mad River Guns (1965)
Black Boulder Ranch (1966)
The Tall Texan (1967)
War on Alkali Creek (1967)
Gun Luck (1968)
Fighting Ramrod (1968)
Rustler's Trail (1968)
Iron Hand (1969)
Riders in the Storm (1969)
Rifles on the Rimrock (1969)
The Bloodskinners (1970)
Gunsmoke Holiday (1970)
Bloody Rifles (1971)
Gambler With a Gun (1971)
Rangeland Feud (1973)
War Drum (1973) (writing as Maria Sandra Sterling)
Range War (1976)
Gun to Gun (1977)
The Gun Lords of Stirrup Basin (1977)
Shoot-out at Milk River (1977)
Gunpowder Mesa (1978)
Rifles on the Range (1978)
Gun Wolves of Lobo Basin (1978)
High Gun (1979)
Trail to Gunsmoke (1980)
The Rawhide Men (1980)
High Border Riders (1981)
Powdersmoke Lawyer (1981)
Broken Creek (1981)
Frontier Lawman (1981)
Broomtail Basin (1981)
Callahan Rides Alone (1981)
Guns of Montana (1981)
North to Powder River (1983)
Cowthief Clanton (1983)
Boothill Brand (1983)
Buckskin Challenge (1983)
Renegade Rifles (1984)
Gun Quick (1984) (writing as Lew Smith)
Boothill brand (1984) (writing as Will Watson)
West of the Barbwire (1985)
Wyoming Gun Law (1986)
Burnt Wagon Ranch (1986)
Lobo Valley (1986)
Bring Bullets, Texan! (1986)
The Bushwhackers (1986)
The Hard Riders (1987)
The Hell Raisers (1988)
Night Riders (1988)
Rope the Wild Wind (1988)
Renegade Rancher (1989)
Puma Pistoleers (1989)
Ride the Wild Country (1989)
The Long Trail North (1990)
Rough Country (1990)
Boot Hill Riders (1990)
Outlaw Bunch (1991)
Rawhide (1991)
Springboard to Love (1991) (writing as Grace Lang)
Bonanza At Wishbone (1991)
Pinon Mesa (1991)
Gambler's Guns (1991)
Powdersmoke Canyon (1991) (writing as Lew Smith)
Wyoming Showdown (1991)
Scattergun Grass (1992)
Love a Hostage (1993) (writing as Grace Lang)
The Smokestack Iron (1993) (writing as Lee Thomas)
Coyotes of Willow Brook (1994)

Crowned Harp: Memories of the Last Years of the Crown in Ireland (1960)
The American Dream: A History of the United States (1977) (writing as Lew Smith)