80 books • 13 series
Book #87: Corpse in the Waxworks
Book #100: The Seat of the Scornful
Book #112: The Black Spectacles
Book #4: The Blind Barber
Book #5: Death-Watch
Book #9: To Wake the Dead
Book #12: The Man Who Could Not Shudder
Book #20: In Spite of Thunder
Book #5: The Four False Weapons