num_pages: 3
description: Three paperback books in a gift box that contains:* 
  Time Travel and Other Mathematical Bewilderments
* 
  Penrose Tiles to Trapdoor Ciphers and the Return of Dr. Matrix
* 
  Knotted Doughnuts and Other Mathematical Entertainments

language: English
title: A Gathering of Gardner: Time Travel & Other Mathematical Bewilderments/Penrose Tiles to Trapdoor Ciphers & the Return of Dr. Matrix/Knotted Doug
titlecomplete: A Gathering of Gardner: Time Travel & Other Mathematical Bewilderments/Penrose Tiles to Trapdoor Ciphers & the Return of Dr. Matrix/Knotted Doug
ratings_count: 2
publisher: W H Freeman & Co.