I debated a little on whether or not this title belongs in the “must read” category.  The explanations of the difference between submissive, assertive and aggressive behaviors are very enlightening.  The clincher for me is one of the early chapters which describes road blocks.  Road blocks are simple statements that have the effect of ending conversation, and thereby communication.  Usually this is intentional, but not always.  Positive statements can be road blocks – clever politicians know how to use them this way!  The material otherwise aligns with the two Leadership Development courses I have taken: Coaching for Performance and Results and Effective Communication.  I would recommend taking the former class, then reading this book as a follow-up some time latter.