31 books • 4 series
Book #6: Murder on the Thames
Book #7: The Baker Street Murders
Book #8: Death in Kensington
Book #2: Murder in the Air
Book #3: The Bloomsbury Murder
Book #4: The Tower Bridge Murder
Book #1: Tragedy at Piddleton Hotel
Book #2: Murder in Cold Mud
Book #3: Puzzle in Poppleford Wood
Book #5: Wheels of Peril
Book #6: The Poisoned Peer
Book #1: Limelight
Book #2: The Rookery
Book #3: The Maid's Secret
Book #4: The Inventor
Book #5: Curse of the Poppy