One of the most complained about and denigrating social issue that impacts human relationships and friendships is the Know-It-All behavior in all its manifestations and ramifications. Furthermore, most people know and remember vividly the feeling of discomfort and tense trepidation that lasts the duration of an encounter with a Know-It-All. The tens of thousands of Know-It-All related complaints from people of all walks of life, gender and culture helps us to comprehend the magnitude of this exasperating and aggravating social problem. This book is uniquely a first on many fronts, it defines the term Know-It-All, identifies who is a Know-It-All, enumerates in an anecdotic manner the different ways people manifest the Know-It-All behavior, recounts how the Know-It-All behavior makes us feel, details psychologist's recommendations for curtailing and stopping the Know-It-All behavior, and finally empowers victims with 20 practical ways to peacefully and respectfully shut up a Know-It-All. This well researched book has more than 250 references.