Mind-stretching math puzzles
2005
Inspector Forsooth's whodunits
1998
The Inner Game of Investing
1999
Classic Whodunits
2003
Whodunnits
2000
Hard-to-Solve Math Puzzles
2001
A killing on Wall Street
2000
Inspector Forsooths Minimysteries
2009
The little giant book of math puzzles
2000
The puzzler's dilemma
2012
Brain Aerobics Math Puzzles
2013
Math Puzzles for the Clever Mind
Casse-têtes énigmatiques
2009
Classic brain twisters
2005
Number freak
2009
Number Freak From 1 To 200 The Hidden Language Of Numbers Revealed
2011
Sit & Solve® Brainteasers
2010
Giant Flip Book
2002
Pocket Puzzlers
2000
Un privé à Wall Street
2001
What the Numbers Say
2003
Énigmes Mathématiques
