About this book

Knotted doughnuts and other mathematical entertainments, written by Martin Gardner, is now in the public domain and available here for free download. this title joins thousands of works in our education collection.

Click the download button above to receive the complete text in your preferred ebook format—PDF, EPUB, MOBI, or plain text.

See all →

NYC Quote
Cover of Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Unknown

Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)
Cover of The Elements of Style by William Strunk, Jr.

The Elements of Style
Cover of The Richest Man in Babylon by George S. Clason

The Richest Man in Babylon
Cover of Fifteen Thousand Useful Phrases by Grenville Kleiser

Fifteen Thousand Useful Phrases
Cover of The English Tongue by Thomas Dilworth

The English Tongue