17 books • 5 series
Knowhow Book of Spycraft
Little Giant Book of Mini-Mysteries (Little Giant Books)
The Knowhow Book of Spycraft
Great Book of Whodunnit Puzzles
Great Book of Whodunit Puzzles
Knight Book of Secret Codes
Super Sleuth (Knight Books)
Puzzle Time (Knight Books)
Secret Messages (Usborne Spy Guides)
The Knowhow Book of Codes, Secret Agents & Spies (Knowhow Books)
Spycraft (Know How Books)
Pastime Games (Knight Books)
Grand Howl
Tawny Talent
Tawny Trail
Commonwealth Cub Scout Book
Camping and Hiking (Knight Books)