11 books
Jack of all Trades
Monochrome Noir
The Mystery of Southsea's Laughing Sailor
The Mystery of The Bishop's Golden Tankard
The Mystery of Who Smashed Brighton Rock
The Mystery of the Sabotaged Balloon
The Mystery of The Prince's Stolen Statue
The Mystery of Who Pushed Molly May
The Mystery of Nelson's Stolen Diamonds
Class of 67
The Jocelyn Bust Case