Rope Knot tying skills

Hi found a old post from someone wanting scout ideas from a few days ago and a old post asking about knots from October how many of you have a copy of the book The Ashley Book of Knots or The Ultimate encyclopedia of Knots ??? Or some other knot book in your gear And what one is it?? their are many good hand books to have with you. I have found knots to be a underrated skill.. Not only in my profession of being a electrician or my Volunteer work or under paid volunteer work on the SAR team. I do not believe that you can go through a day in your life without ever needing this skill even in the simplest form tell me what you think