Ivan Moscovich
1926
Ivan Moscovich is a designer and commercial developer of puzzles, games, toys, and educational aids. *--Wikipedia*
The Little Book of Big Brain Games
The Big Book of Brain Games
Mindgames
More BrainMatics Logic Puzzles
Big Book of Brain Games
The Hinged Square and Other Puzzles (Mastermind)
Brain-Flexing Balance Problems & Other Puzzles (Mastermind Collection)
Puzzle Universe
1000 Play Thinks
Cunning Combination Problems & Other Puzzles (Mastermind Collection)
Fiendishly difficult math puzzles
Fiendishly frustrating brain-twisting puzzles