An Untwisted Mind

Further reading:

Knot theory - Wikipedia, the free encyclopedia

Knots can be described in various ways. Given a method of description, however, there may be more than one description that represents the same knot. For example, a common method of describing a knot is a planar diagram called a knot diagram. Any given knot can be drawn in many different ways using a knot diagram.

The Ashley Book of Knots - Wikipedia, the free encyclopedia

The Ashley Book of Knots is an encyclopedia of knots written and illustrated by the American artist Clifford W. Ashley. First published in 1944, it was the culmination of over 11 years of work. The book contains more than 3800 numbered entries and an estimated 7000 illustrations.