* "Mies pilvistä" (1937)
* "Kuolema ilmassa" (1938)
* "Flying Colours" (1940)
* "Double Exposure" (1941)
* "Keltainen huivi" (1942)
* "Ateenan valkoinen ruusu" (1943)
* "The Black Death" (1944)
* "The Scarlet Angel" (1945)
* "The Green Mask" (1946)
* "Sininen juna" (1947)
* "The Purple Cloud" (1948)
* "Punainen kuolema" (1949)
* "The Brown Veil" (1950)
* "The Grey Mist" (1951)
* "Pale Tiger" (1952)
* "The Dark Room" (1953)
* "The Silver Dagger" (1954)
* "The Golden Snake" (1955)
* "Ivory Madonna" (1956)
* "Jade Ring" (1957)
* "The Scarlet Feather" (1958)
* "The Azure Flame" (1959)
* "The Emerald Chalice" (1960)
* "Amber Amulet" (1961)
* "The Ruby Key" (1962)
* "The Pearl Rannekoru" (1963)
* "The Silver Skull" (1964)
* "Kultainen tikari" (1965)
* "Ivory Idol" (1966)
* "The Jade Mask" (1967)
* "The Scarlet Claw" (1968)
* "The Blue Diamond" (1969)
* "The Green Tiger" (1970)
* "The Purple Heart" (1971)
* "Ruskea pantteri" (1972)
* "The Grey Falcon" (1973)
* "Pale Panther" (1974)
* "Pale Fox" (1975)
* "Kultainen susi" (1976)
* "Ivory Owl" (1977)
* "Jadetiikeri" (1978)
* "The Red Death" (1979)
* "Punainen tiikeri" (1980)
* "Punainen ruusu" (1981)
* "The Red Fox" (1982)
* "The Red Falcon" (1983)
* "Punainen susi" (1984)
* "Punainen pantteri" (1985)
* "Punainen pöllö" (1986)
* "The Red Snake" (1987)
* "The Red Dove" (1988)
* "Punainen leijona" (1989)
* "The Red Eagle" (1990)
* "Punainen hevonen" (1991)
* "Punainen karhu" (1992)
* "Punainen lohikäärme" (1993)
* "The Red Phoenix" (1994)
* "The Red Unicorn" (1995)
* "Punainen griffin" (1996)
* "Punainen sfinksi" (1997)
* "Punainen mustekala" (1998)
* "The Red Crab" (1999)
* "Punainen hai" (2000)
* "Punainen skorpioni" (2001)
* "Punainen hämähäkki" (2002)
* "The Red Beetle" (2003)
* "The Red Centipede" (2004)
* "Punainen muurahainen" (2005)
* "Punainen ampiainen" (2006)
* "The Red Bee" (2007)
* "The Red Butterfly" (2008)
* "The Red Moth" (2009)
* "The Red Scarab" (2010)
Tietokirjallisuus:
* "The Spy Behind the Lines" (1939)
* "The Great Spy Myth" (1940)
* "Euroopan salaiset palvelut" (1941)
* "The Spy from Mars" (1942)
* "Spy in the Next Room" (1943)
* "The War Behind the Front" (1944)
* "Hitlerin sodan salaisuus" (1945)
* "Aivojen taistelu" (1946)
* "Näkymätön sota" (1947)
* "The Great Spy Adventure" (1948)
* "The Master Spy" (1949)
* "Spycatcher" (1950)
* "The Spy Network" (1951)
* "The Spy Trap" (1952)
* "The Spy Killer" (1953)
* "The Spy Hunter" (1954)
* "The Spy Chaser" (1955)
* "The Spy Catcher" (1956)
* "The Spy Smasher" (1957)
* "The Spy Breaker" (1958)
* "The Spy Tamer" (1959)
* "The Spy Defier" (1960)
* "The Spy Challenger" (1961)
* "The Spy Traitor" (1962)
* "The Spy Vanisher" (1963)
* "The Spy Assassin" (1964)
* "The Spy Saboteur" (1965)
* "The Spy Destroyer" (1966)
* "The Spy Dictator" (1967)
* "The Spy Conqueror" (1968)
* "The Spy Eliminator" (1969)
* "The Spy Annihilator" (1970)
* "The Spy Exterminator" (1971)
* "The Spy Decimator" (1972)
* "The Spy Vanquisher" (1973)
* "The Spy Obliterator" (1974)
* "The Spy Destroyer" (1975)
* "The Spy Eliminator" (1976)
* "The Spy Annihilator" (1977)
* "The Spy Exterminator" (1978)
* "The Spy Decimator" (1979)
* "The Spy Vanquisher" (1980)
* "The Spy Obliterator" (1981)
* "The Spy Destroyer" (1982)
* "The Spy Eliminator" (1983)
* "The Spy Annihilator" (1984)
* "The Spy Exterminator" (1985)
* "The Spy Decimator" (1986)
* "The Spy Vanquisher" (1987)
* "The Spy Obliterator" (1988)
* "The Spy Destroyer" (1989)
* "The Spy Eliminator" (1990)
* "The Spy Annihilator" (1991)
* "The Spy Exterminator" (1992)
* "The Spy Decimator" (1993)
* "The Spy Vanquisher" (1994)
* "The Spy Obliterator" (1995)
* "The Spy Destroyer" (1996)
* "The Spy Eliminator" (1997)
* "The Spy Annihilator" (1998)
* "The Spy Exterminator" (1999)
* "The Spy Decimator" (2000)
* "The Spy Vanquisher" (2001)
* "The Spy Obliterator" (2002)
* "The Spy Destroyer" (2003)
* "The Spy Eliminator" (2004)
* "The Spy Annihilator" (2005)
* "The Spy Exterminator" (2006)
* "The Spy Decimator" (2007)
* "The Spy Vanquisher" (2008)
* "The Spy Obliterator" (2009)
* "The Spy Destroyer" (2010)