1900 - The Woman Who Disappeared in the Night
1915 - Shadows on the Mauretania
1920 - The Fire of Hatred
1920 - A Shadow at the Window
1925 - The Sins of the Fathers
1925 - The Missing Guest
1928 - The Past Knocks at the Door
1930 - The Secret of the Village
1931 - Murder in Lunigiana
1931 - The Last Witch
1932 - The Shadow of Evil
1932 - The Tragic Night
1933 - The Lady with the Necklace
1933 - The Girl from Constantinople
1933 - Memories of Blood
1935 - Shattered Mirrors
1935 - Blood Chimes at San Giusto
1935 - Blood Poker
1936 - Cherry Blossoms
1937 - Difficult Choices
1937 - At the Bus Stop
1937 - Today I Will Die!
1938 - The Price of Guilt
1938 - The Mystery of the English Girl
1939 - Intrigues, Perfumes, and Pistols
1939 - Intrigue in Shanghai
1943 - A Toast to Cyanide
1943 - The Black Widow
1945 - Angelus Mortis
1947 - The Evil Behind the Veil
1948 - A Cry from Hell
1950 - After Sunset
1950 - Death Under the Sun
1950 - Faces from the Past
1950 - Kiss of Death
1951 - The Eyes of the Serpent
1951 - In an Old Photo
1952 - Did You See That Man?
1953 - Death in Dissolve I
1953 - Death in Dissolve II
1953 - Request for Discretion
1958 - The White Palace (Radio Drama)
1960 - Hanging by a Thread
1960 - Four Little Friends
1960 - Who Killed Brigitta Diaz?
1960 - Behind the Curtain
1961 - West of Friedrichstrasse
1962 - Next Stop: Murder (Radio Drama)
1962 - Five O'Clock Tea
1968 - The Chessboard Enigma
1973 - The Atoll of Cats
1974 - The Dead of Trastevere
1974 - The Colors of Hate
1976 - What Remains
1980 - Friday the 17th
1987 - Death in the Castle
1988 - Deadly Shots
1988 - Macabre Marionettes
1988 - Reflections of Death
1989 - Checkmate
1989 - Appointment with Death
1989 - Barbed Wire
1990 - The Bloody Key
1991 - Blood Red Lips
1992 - Omega Database
1992 - The Moth’s Den
1993 - Alpha Database
1993 - Beta Database
1993 - The Killer’s Theorem
1996 - Acapulco Dreaming
1998 - The Last Night on Earth
1998 - Sometimes They Come Back (Radio Drama)
1999 - Murder on the 37th Floor
2003 - Laura Has Disappeared
2009 - In the Killer’s Web