A series of logic puzzles designed by some of Mensa's leading puzzlesetters which will help boost brain activity and improve concentrationand memory - while pro

It's not elementary, but you will need Holmes's famed powers of deduction to solve these crafty puzzles. Here's how it goes: at the end of each condundrum, you'

How well do you think logically? Find out with these puzzles. But don't forget the degree of difficulty increases as you go.

Acclaimed teacher and puzzler Evelyn B. Christensen has created one hundred brand-new perplexing and adorably illustrated games for young puzzlers. There is som