"Learn the tools to shed your mask of extroversion, develop your own magnetism, and reveal the true you. One third to one half of Americans are introverts in a culture that celebrates-even enforces-an ideal of extroversion and a cult of personality. Political leaders are charismatic, celebrities bask in the spotlight, and authority figures are assertive. It is no surprise that a "quiet revolution" has begun to emerge among the "invisible" half of...