This is one of the best books I have read on change management, which separates it from the dirth of publications which flood the market which don't offer anything new. A truly excellent publication.
It is primarily suited to those working in delivering change. I would also recommend it as a guide to sponsors, managers and team leaders, to understand what change feels like and compare their own experiences with those in other organisations. William Bridges writes from experience and this is very much a practical guide, suggesting techniques appropriate at each stage of change.
This publication is relatively light on the theory behind change. This is to its advanatge, however for those coming to these theories for the first time, it is best read in conjunction with a partner text which can provide more background to change and particularly the stages of change.