Finally I know what it is and how it is used

On a site, I discovered the Kettlebell, where this helps you to alter your muscles. I saw everywhere on the net, while doing my curiosity, I wanted to know a little more. So I procured this book. What is good is that the author explains its history, the size we have to choose, then the different exercises and finally a training program.
So I procured a Kettlebell and I will start my training.