- The Adventures of Jacky Raccoon (1921)
- Mysteriet med den gamle møllen (1923)
- The Secret of the Old Clock (1924)
- The Ghost in the Garret (1925)
- The Clue in the Crumbling Wall (1927)
- Den usynlige inntrengeren (1928)
- The Phantom of the Pool (1929)
- Gåten om den røde rosen (1930)
- The Tragedy of the Twin Towers (1931)
- The Mystery of the Moaning Cave (1933)
- The Secret of the Singing Sword (1935)
- The Ghost in the Grey Suit (1937)
- The Clue of the Crimson Key (1941)
- The Riddle of the Raven's Skull (1943)
- Mysteriet med det skjulte rommet (1946)
- The Secret of the Skeleton Key (1950)