The hangman's paradox, cat's cradle, gambling, peg solitaire, pi and e. All these and more are back, in Martin Gardner's inimitable style, with updates on new developments and discoveries. Read about how knots and molecules are related, take a trip into the fourth dimension, try out new dissections ...

The hangman's paradox, cat's cradle, gambling, peg solitaire, pi and e. All these and more are back, in Martin Gardner's inimitable style, with updates on new developments and discoveries. Read about how knots and molecules are related, take a trip into the fourth dimension, try out new dissections of stars, crosses and polygons, and challenge yourself with new twists on classic games.