 John William Bobin also wrote under the pseudonyms 'John Ascott' and 'Mark Osborne'. The novels written under his own name and under the pseudonym 'Mark Osborne' feature 'Sexton Blake', a detective modelled on Sherlock Holmes. See also this list for other Sexton Blake authors. |
Titles and year of publication:
| 1) The Shadow of His Crime | 1915 |
| 2) The Banker's Trust | 1916 |
| 3) The Grip of the Law | 1916 |
| 4) The Merchant's Secret | 1916 |
| 5) Payment in Full | 1916 |
| 6) The Case of the International Adventurer | 1917 |
| 7) A Legacy of Shame | 1917 |
| 8) Sexton Blake – Special Constable | 1917 |
| 9) Ten Years After | 1917 |
| 10) The Case of the Girl Reporter | 1918 |
| 11) The Case of the Two Bankers | 1918 |
| 12) In the Shadow of the Guillotine | 1918 |
| 13) The Stolen Crown | 1918 |
| 14) The Boy Without a Memory | 1919 |
| 15) Daylight Robbery | 1919 |
| 16) The Hidden Menace! (Also published as: The Mystery of the Dope Den [1939]; as by John Andrews) | 1919 |
| 17) The Island Mystery | 1919 |
| 18) The Matador's Fortune | 1919 |
| 19) The Mystery of the "Agony" Advert | 1919 |
| 20) The Mystery of the Grey Car | 1919 |
| 21) The Problem of the Derby Favorite | 1919 |
| 22) The Riddle of Riverdale | 1919 |
| 23) The Stolen Partnership Papers | 1919 |
| 24) The Great Diamond Bluff | 1920 |
| 25) His Son's Honour | 1920 |
| 26) Link by Link | 1920 |
| 27) The Only Son | 1920 |
| 28) Out of the Reach of the Law | 1920 |
| 29) Twice Wronged! | 1920 |
| 30) The Case of the Island Trader | 1921 |
| 31) Payment Suspended | 1921 |
| 32) The Case of the Bogus Laird | 1922 |
| 33) The Case of the Cultured Pearls | 1922 |
| 34) The Case of the Trade Secret | 1922 |
| 35) The Hooded Riders | 1922 |
| 36) In the Grip of the Tong | 1922 |
| 37) A Legacy of Vengeance | 1923 |
| 38) The Mystery Mandarin | 1923 |
| 39) The Case of the Head Dispenser | 1924 |
| 40) The Case of the Bookmaker Baronet | 1926 |
| 41) The Case of the Long-Firm Frauds | 1926 |
| 42) The Fatal Pit | 1927 |
| 43) The Tour of Terror | 1927 |
| 44) The Great "Tote" Fraud | 1929 |
| 45) The Secret of the Surgery | 1929 |
| As 'John Ascott' | |
| 1) The Ringer ‘Tec | 1928 |
| 2) The Secret of the Grey Phantom | 1928 |
| 3) The Speedman Crook | 1929 |
| 4) The Death Patrol | 1930 |
| 5) The Great Shipyard Mystery (featuring Sexton Blake) | 1931 |
| As 'Mark Osborne' | |
| 1) The Boarding House Mystery | 1931 |
| 2) The Consulting Room Crime (Also published as: The Consulting Room Mystery [1940]) | 1932 |
| 3) Dead Man's Bay | 1932 |
| 4) The Kennels Crime | 1932 |
| 5) The Mystery of the Lost Legionnaire | 1933 |
| 6) The Stables Crime | 1933 |
| 7) The Case of the Crook Iron Master | 1934 |
| 8) The Dog Track Murder | 1934 |
| 9) The Great Art-Gallery Crime | 1932 |