The Ashley Book of Knots
The Ashley Book of Knots is an encyclopedia of knots first published in 1944 by Clifford Ashley. The culmination of over 11 years of work, it contains some 7000 illustrations and more than 3854 entries covering over 2000 different knots. The entries include instructions, uses, and for some knots, histories, and are categorized by type or usage. It remains one of the most important books on knots, as it is one of the most extensive, covering both good knots and bad, and noting which is which.