The one arm pull up is, to put it simply, impressive. It represents an unusual kind of strength that seems to go beyond what a normal human can accomplish, and crosses into something animal.
It's a goal that many people have, but few spend any real time on it because it's hard to know where to start. That difficulty stems from two main reasons:
1) Not many people know how to train for a one arm pull up or chin up, so there aren't a lot of resources out there to help someone who wants to learn the correct exercises.
2) The one arm pull up (and one arm pull up training) requires you to put a lot more strain on your joints and muscles than you would during normal exercise—in other words, if you don't know what you're doing, you can really hurt yourself.
The trial-and-error approach to one arm pull up and chin up training can take a long time, and—if you hurt yourself—it can leave you worse off than you were when you started. This book is designed to be the practical resource you need to help you achieve your goal in a way that maximizes your results, and minimizes headaches.