TY  - BOOK
AU  - Gardner, Martin.
TI  - Penrose tiles to trapdoor Ciphers: and the return of Dr.Matrix
SN  - 0883855216
PY  - 1997///
CY  - New York
PB  - Mathematical Association of America
KW  - Jeux mathématiques
KW  - Puzzles and games
KW  - Mathematical recreations
N1  - 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
N2  - 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
ER  -