The nice thing about this book is it makes change management extremely palatable. It's about identifying change, communicate effectively the change across all affected party in a manner that's acceptable but yet not rousing panic, create awareness and come up with a change that's acceptable to all even if that means complete change in the way processes work in the setup. Once it's all done, set up a team around it who can keep the new processes going. The only problem is by reading this you may get a false feeling that it's all so simple and you make it all happen. Backing this book are a good 5-6 books worth of research which John Kotter has written.
A beginner's insight into change management. But don't forget to complete the supplemental readings if you actually want to have a formal experience of change management.