39 books
The Daffodil Mystery Illustrated
White Face
On the Spot
The Daffodil Mystery
The Clue of the Twisted Candle
The Keepers of the King's Peace
The Man who Passed
Sanders
Planetoid 127
The Duke in the Suburbs
The Yellow Snake
Terror Keep
The Blue Hand
The Square Emerald
The Guv'nor
The Valley of Ghosts
The Face in the Night
The Coat of Arms
The Man who bought London
The Flying Squad
The Clue of the New Pin
The Green Rust
The Sinister Man
The Crimson Circle
