For those interested in kettlebells, but worried about possible drawbacks and dangers that might be hiding behind the hype, this is a superbly reassuring choice. Even if you give up trying to read it, you'll still be reassured. The technical detail, the authors' credentials, the mass of physiological and even biochemical detail presented (I had my girlfriend, a biochemist, check some of it - it was completely correct) will leave you convinced.
However, unless you're ***damn*** serious about working out, you may end up skimming. That's fine - the book is nicely broken down into chapters and you don't have to learn about the golgi tendon organ and the role of Human Growth Hormone in keeping down body fat if you don't want to. Although you'd probably find it beneficial - and fascinating, the authors have done a great job - if you did read every chapter. You'd have a superb understanding not just of kettlebells but of exercise physiology and how it relates to practical training - how to avoid overtraining, muscle cell recruitment, periodization, etc. This is one of the few exercise books that I'd consider possibly life-changing.