SPIED: Can YOU Crack the Code as a Secret Agent? (Click Your Poison)

HAUNTED: Can YOU be Scared... to Death? (Click Your Poison)

Can You Crack The Code: 100 Logic Puzzles

HAUNTED Deluxe Illustrated Collector's Edition: Can YOU be Scared... to Death? (Click Your Poison)

the Imperial War Museums Code Breaking Puzzles: Can you crack wartime codes?