Most climbers are concerned about what might happen if there were an accident high on a steep face. Most climbers play-out some kind of heroic scenario in their heads where they get out of said accident. But most climbers don't spend the time required to learn how to deal with a serious situation. In other words, the reality vs. what plays out in a climber's head could be quite different. As such, all climbers need to invest some time in learning about rock rescue.
The best way to acquire the skills required to deal with an accident in a multi-pitch setting is to take a class on it. But for those who don't have the time or the money, Andy Tyson and Molly Loomis have written an excellent textbook on the subject entitled, Climbing Self-Rescue: Improvising Solutions for Serious Situations.
Tyson and Loomis put together a book that starts with what one should do in the case of an accident and then goes into an overview of baseline knowledge. They discuss knots and hitches as well as ropes, webbing and carabiners. After this introduction, they present the alternatives available to a climber during a rescue. These are escaping the belay, rappelling, hauling and lowering. And though these sound like simple things, in reality they are quite difficult with a injured or unconscious patient. Each technique requires a series of steps that are outside the average climber's knowledge base.
The primary competitor to this book is A Falcon Guide: Self-Rescue by David J. Fasulo. While this book is also excellent and covers much of the same ground as Climbing Self-Rescue, Tyson and Loomis have one-upped the Fasulo book by adding a comprehensive series of scenarios at the end of their text which could be used in "practice rescues." The scenarios are complex and often require mastery of multiple rescue techniques in order for a climber to achieve success. And indeed, it is when one has mastery that one will actually be able to deal with a real situation. This element above all others makes Climbing Self-Rescue the better book.
Climbing Self-Rescue: Improvising Solutions for Serious Situations.
--Jason D. Martin