The Pocket Guide Book to Prepper Knots
A Practical Resource to Knots That Can Help You Survive. By Patty Hahne.
Knots are an essential skill that everyone should know. You don't have to learn every knot but a good stock of what you need is an invaluable tool.
It is a 155 page paperback book that covers topics such as uses for various types of ropes, how knots affect the overall rope strength, multipurpose knots, and more.