* The House Between (1938)
* No Stranger to the Stars (1939)
* Vind fra fjellet (1941)
* This Is My Best (medforfatter med George P. Abraham, 1942)
* Ring den nye verden (1943)
* Kaptein Garfio og andre historier (1951)
* Peter Cottontail and Other Stories (1951)
* Kongens stylter og andre historier (1952)
* The Story Garden (1952)
* Snowshoe Paws and Other Stories (1952)
* Big Cheese and Other Stories (1953)
* The Adventures of Danny Meadow Mouse and Other Stories (1953)
* Little Dog Toby and Other Stories (1954)
* Mr. Whistles hemmelighet og andre historier (1955)
* Prinsen og gåsejenta (1955)
* Old Man Possum and Other Stories (1956)
* That Girl Judy (1957)
* Mystery at Thunderbolt House (1958)
* Min søster Mike (1958)
* Secret of Hollow Tree Camp (1959)
* Året julenissen ble moderne (1959)
* Shadow of a Secret (1960)
* Nancy Clark, hemmelig agent (1961)
* Nancy Clark, Trouble Shooter (1961)
* The Secret of the Hidden Room (1961)
* Nancy Clark, utenrikskorrespondent (1962)
* Nancy Clark, Mystery Girl (1963)
* The Golden Slippers and Other Stories (1963)
* Nancy Clark, jentereporter (1963)
* Time for Tomorrow, Janet Carroll (1963)
* Nancy Clark, News Hen (1964)
* The Treasure Box (1964)
* Nancy Clark, politireporter (1965)
* Nancy Clark, samfunnsreporter (1966)
* The Mystery Girl Next Door (1966)
* Nancy Clark, modell for mord (1967)
* Nancy Clark, Danger Ahead (1968)
* Katten i speilet og andre historier (1968)
* Nancy Clark, dobbel identitet (1969)
* The Mystery Next Door (1969)
* Nancy Clark, Assignment Murder (1970)
* The Secret of the Magic Box (1970)
* The Haunted Lighthouse and Other Stories (1971)
* Mysteriet ved Devil's Cove (1972)
* Mysteriet med den stjålne ringen (1973)
* The Mystery at Lonely Point (1974)
* The Whispers in the Dark (1975)
Noveller
* "Huset mellom" (1938)
* "No Stranger to the Stars" (1939)
* "Vind fra fjellet" (1941)
* "Ring den nye verden" (1943)
* "Kaptein Garfio" (1951)
* "Peter Cottontail" (1951)
* "Kongens stylter" (1952)
* "Snowshoe Paws" (1952)
* "Big Cheese" (1953)
* "The Adventures of Danny Meadow Mouse" (1953)
* "Little Dog Toby" (1954)
* "Mr. Whistles hemmelighet" (1955)
* "Prinsen og gåsejenta" (1955)
* "Old Man Possum" (1956)
* "That Girl Judy" (1957)
* "Mystery at Thunderbolt House" (1958)
* "Min søster Mike" (1958)
* "Secret of Hollow Tree Camp" (1959)
* "Året julenissen ble moderne" (1959)
* "Shadow of a Secret" (1960)
* "Nancy Clark, hemmelig agent" (1961)
* "Nancy Clark, Trouble Shooter" (1961)
* "Hemmeligheten bak det skjulte rommet" (1961)
* "Nancy Clark, utenrikskorrespondent" (1962)
* "Nancy Clark, Mystery Girl" (1963)
* "Time for Tomorrow, Janet Carroll" (1963)
* "Nancy Clark, jentereporter" (1963)
* "Nancy Clark, News Hen" (1964)
* "Skatteboksen" (1964)
* "Nancy Clark, politireporter" (1965)
* "Nancy Clark, samfunnsreporter" (1966)
* "The Mystery Girl Next Door" (1966)
* "Nancy Clark, modell for mord" (1967)
* "Nancy Clark, Danger Ahead" (1968)
* "Katten i speilet" (1968)
* "Nancy Clark, dobbel identitet" (1969)
* "The Mystery Next Door" (1969)
* "Nancy Clark, Assignment Murder" (1970)
* "The Secret of the Magic Box" (1970)
* "The Haunted Lighthouse" (1971)
* "Mysteriet ved Devil's Cove" (1972)
* "Mysteriet med den stjålne ringen" (1973)
* "The Mystery at Lonely Point" (1974)
* "The Whispers in the Dark" (1975)