Penrose tiling
Penrose tiling II
Mandelbrot's fractals
Conway's surreal numbers
Back from the Klondike and other problems
The Oulipo
The Oulipo II
Wythoff's Nim
Pool-ball triangles and other problems
Mathematical induction and colored hats
Negative numbers
Cutting shapes into n congruent parts
Trapdoor ciphers
Trapdoor ciphers II
Hyperbolas
The new Eleusis
Ramsey theory
From Burrs to Berrocal
Sicherman dice, the Kruskal count and other curiosities
Raymond Smullyan's logic puzzles
The return of Dr. Matrix

A collection of some of Gardner's "Mathematical Games" columns from twenty-five years of Scientific American. New material included in a bibliography and a postscript