16 books
Go! Games
The Big Brain Puzzle Book
Quotable Cryptograms
Pirate Word-Doku
Magic Word-Doku
The Big Book of Bathroom Brain-sharpeners
The Big Book of Mind-Bending Puzzles
The Big Book of Stickelers
Mindstretching Puzzles
Puzzle Power
Puzzles for the Super Sharp
The Brainiac's Puzzle Book
Just How Smart Are You?
Mind Bending Puzzles
Brain Stretchers Bk 3
Puzzling Frame Games