| Series | | Books |
| |
| Harker Bellamy | | (1928) |
| | | (1932) |
| | | (1932) |
| | | (1934) |
| | | (1935) |
| | | (1936) |
| | | (1939) |
| | | (1940) |
| | | (1944) |
| | | (1948) |
| |
| Brett Carstairs | | (1931) |
| | | (1931) |
| |
| Bunny Chipstead | | (1927) |
| | | (1928) |
| | | (1934) |
| | | (1940) |
| |
| Brian Fordinghame | | (1926) |
| | | (1930) |
| | | (1932) |
| | | (1934) |
| |
| Justin March | | (1941) |
| | | (1952) |
| | | (1953) |
| |
| Tiger Standish | | (1932) |
| | | (1934) |
| | | (1935) |
| | | (1936) |
| | | (1939) |
| | | (1940) |
| | | (1941) |
| | | (1941) |
| | | (1942) |
| | | (1943) |
| | | (1944) |
| | | (1948) |
| | | (1949) |
| | | (1951) |
| |
| Baron Veseloffsky | | (1926) |
| | | (1928) |
| |
| Paul Vivanti | | (1925) |
| | | (1927) |
| | | (1929) |
| | | (1931) |
| | | (1935) |
| | | (1945) |
| |
| Other | | Standish of the Rangeland (1916) |
| | | The Breed of the Beverleys (1920) |
| | | Goal! (1920) |
| | | The Legend of the League (1922) |
| | | Love, the Sportsman (1923) |
| | | McPhee aka The Great Game (1923) |
| | | The Ball of Fortune (1925) |
| | | School! School! (1925) |
| | | The House of Secrets (1926) |
| | | The Man Who Saved the Club (1926) |
| | | On the Ball! (1926) |
| | | The Black Heart (1927) |
| | | That Fellow Hagan! (1927) |
| | | The 13th Hour (1928) |
| | | Heart Cut Diamond (1929) |
| | | Lady Of The Night (1929) |
| | | Checkmate (1930) |
| | | Danger's Bright Eyes (1930) |
| | | The Evil Chateau (1930) |
| | | The Exploits of Peter (1930) |
| | | A Pro's Romance (1930) |
| | | Adventure Calling! (1931) |
| | | Cavalier Of Chance aka Peril! (1931) |
| | | The False Purple aka Princess After Dark (1931) |
| | | Midnight Love (1931) |
| | | The Temptation of Mary Gordon (1931) |
| | | Wolves of the Night (1931) |
| | | Gentleman-in-waiting (1932) |
| | | Horror's Head [Inspector H. Emp] (1932) |
| | | The Formula aka The Charlatan (1933) |
| | | Harlequin of Death (1933) |
| | | Huntress Of Death (1933) |
| | | The Man Who Shook The Earth (1933) |
| | | The Menace (1933) |
| | | The Man From Scotland Yard (1934) |
| | | S.O.S (1934) |
| | | Song of the Scrum (1934) |
| | | The Vampire (1935) |
| | | The Lessing Murder Case (1935) |
| | | The Traitor (1936) |
| | | Death At Court Lady (1936) |
| | | The Hidden Hand (1937) |
| | | Instruments of Darkness (1937) |
| | | They Called Him Nighthawk [Gerald Frost (Nighthawk)] (1937) |
| | | Dark Journey (1938) |
| | | A Gentleman for the Gallows (1938) |
| | | Knaves & Co (1938) |
| | | The Evil Messenger [Sebastian Quin] (1938) |
| | | The Phantom Forward (1939) |
| | | Terror On Tip-toe (1939) |
| | | Here Is an S.O.S [Chief Constable George Meatyard] (1939) |
| | | Girl Trouble (1940) |
| | | Haloes for Hire (1940) |
| | | The Return of The Nighthawk [Gerald Frost (Nighthawk)] (1940) |
| | | Dr. Cupid (1941) |
| | | The Man Who Died Twice (1941) |
| | | The Man Who Stayed To Supper (1941) |
| | | Nighthawk Strikes To Kill [Gerald Frost (Nighthawk)] (1941) |
| | | Danger Preferred (1942) |
| | | The Man in White (1942) |
| | | The Night of Reckoning (1942) |
| | | Now Let Us Hate (1942) |
| | | Fear Walked Behind [Sebastian Quin] (1942) |
| | | High Hazard (1943) |
| | | The Hostage (1943) |
| | | The Man Who Mislaid the War (1943) |
| | | The Man Who Preferred Cocktails (1943) |
| | | Murder Is So Simple (1943) |
| | | Springtime Comes to William (1943) |
| | | The Man with Dry Hands (1944) |
| | | Sinister Street (1944) |
| | | Nighthawk Mops Up [Gerald Frost (Nighthawk)] (1944) |
| | | A Bullet for the Countess (1945) |
| | | Marry the Girl (1945) |
| | | Murder for Sale (1945) |
| | | Terror Comes to Twelvetrees (1945) |
| | | High Pressure (1946) |
| | | Oh, Professor! (1946) |
| | | The Corridors of Fear (1947) |
| | | The House of the Uneasy Dead (1947) |
| | | The Man with Three Wives (1947) |
| | | Ring Up Nighthawk [Gerald Frost (Nighthawk)] (1947) |
| | | The House With The Light (1948) |
| | | Man Alive (1948) |
| | | The Man Who Did Not Hang (1948) |
| | | The Man Who Loved Spiders [Chief Constable George Meatyard] (1948) |
| | | The Beacon Light (1949) |
| | | A Man of Affairs (1949) |
| | | Whilst the Crowd Roared (1949) |
| | | Master Of Venom [Inspector H. Emp] (1949) |
| | | The Blanco Case (1950) |
| | | The High Game (1950) |
| | | Nap On Nighthawk (1950) |
| | | Wedding Bells (1950) |
| | | The Devil Comes to Bolobyn (1951) |
| | | The Man of Evil (1951) |
| | | The Mystery of Mr X (1951) |
| | | These Men and Women (1951) |
| | | The Web (1951) |
| | | The Man in the Cloak [Robert Wynnton] (1951) |
| | | The Face Of Stone (1952) |
| | | The Mocking Face of Murder (1952) |
| | | Murderer At Large [Inspector H. Emp] (1952) |
| | | The Man Who Used Perfume [Robert Wynnton] (1952) |
| | | The Cage (1953) |
| | | Death of a Spy (1953) |
| | | The Secret Hand (1954) |
| | | The Dark Hostess (1955) |
| | | The Man in the Hood (1955) |
| | | The Man in the Shadows (1955) |
| | | Nighthawk Swears Vengeance [Gerald Frost (Nighthawk)] (1 (4)) |
| |