Knots You Need is one of my favorite books that has taught me some very useful knots. I have more than a few books on the subject, but all are lacking to some degree. Some explained the reasoning for the knots, yet had horrible illustrations. Others were very clearly laid out with descriptions and pictures, but gave no use or reason as to why someone would want to use the knot in question. This book was one of the best I have found, since it has all the above qualities and more.
One great aspect about the book is that the knots are in a very neat and logical order. The book is divided into five main sections. Camping, Boating, Climbing, Fishing, and Decorative. Those five sections are further divided into subsections of the types of knots commonly used in those activities, such as hitches, loops, bends, etc. The sections are all color coded on the sides of the pages enabling the reader to quickly find the most useful knot for the need.
Each knot is very clearly illustrated, with a series of rather large photographs showing each step in the completion process. This is a relief from the tiny drawings found in many other books. At the top of each page is the title of the knot, and a short statement of what it is used for. Then there are a few paragraphs that explain the knot in more detail such as advantages/disadvatages, and some alternate uses for the knots.
Overall, this is a great book for all experience levels. The chosen selection covers just about any task a common person would need and then some. Definitely one of the best knot books out there, and I highly recommend it.