Introduction: the long road back to my innermost self -- Part I: what is introversion? -- Exploring introversion -- Exploring the extroversion-introversion spectrum -- Exploring the science of personality -- Exploring the role of nature: personality and the brain -- Exploring the role of nurture: developing personality and the changing brain -- Exploring the role of personal choice: our motivations meet personality -- Part II: exploring introverted challenges and strengths in an extroverted society -- The problem with the extroversion ideal -- Brain stimulation, energy, and the introvert battery -- The hidden abilities of our highly-stimulated minds -- On normality, mental health, and our social connections -- Part III: the many paths and pursuits of introverted joy -- On cultivating self-communication and self-relationships -- Exploring motivation, anticipation, and our projects and passions -- Building our quiet environments and creating a home base.