Ken Holt
The titles are listed by the original publication date.
The Secret of Skeleton Island
1949
☆☆☆☆☆
To be reviewed...
The Riddle of the Stone Elephant
1949
☆☆☆☆☆
To be reviewed...
The Black Thumb Mystery
1950
☆☆☆☆☆
To be reviewed...
The Clue of the Marked Claw
1950
☆☆☆☆☆
To be reviewed...
The Clue of the Coiled Cobra
1951
☆☆☆☆☆
To be reviewed...
The Secret of Hangman's Inn
1951
☆☆☆☆☆
To be reviewed...
The Mystery of the Iron Box
1952
☆☆☆☆☆
To be reviewed...
The Clue of the Phantom Car
1953
☆☆☆☆☆
To be reviewed...
The Mystery of the Galloping Horse
1954
☆☆☆☆☆
To be reviewed...
The Mystery of the Green Flame
1955
☆☆☆☆☆
To be reviewed...
The Mystery of the Grinning Tiger
1956
☆☆☆☆☆
To be reviewed...
The Mystery of the Vanishing Magician
1956
☆☆☆☆☆
To be reviewed...
The Mystery of the Shattered Glass
1958
☆☆☆☆☆
To be reviewed...
The Mystery of the Invisible Enemy
1959
☆☆☆☆☆
To be reviewed...
The Mystery of Gallows Cliff
1960
☆☆☆☆☆
To be reviewed...
The Clue of the Silver Scorpion
1961
☆☆☆☆☆
To be reviewed...
The Mystery of the Plumed Serpent
1962
☆☆☆☆☆
To be reviewed...
The Mystery of the Sultan's Scimitar
1963
☆☆☆☆☆
To be reviewed...