
The 85 Ways to Tie a Tie (ISBN 1-84115-249-8), by Thomas Fink and Yong Mao, was published by Fourth Estate on Nov 4, 1999, and subsequently published in nine other languages.
Wikipedia: link
Other References:
http://www.tcm.phy.cam.ac.uk/tmf20/tieknots.shtml
http://www.tcm.phy.cam.ac.uk/tmf20/85ways.shtml
http://www.tcm.phy.cam.ac.uk/~tmf20/TIES/PAPERS/paper_physica_a.pdf