Part 1. Introduction. R. J. Coplan, K. H. Rubin, Social Withdrawal and Shyness in Childhood: History, Theories, Definitions, and Assessments. Part 2. Constructs and Conceptual Approaches. L. A. Schmidt A. H. Buss, Understanding Shyness: Four Questions and Four Decades of Research. W. R. Crozier, Shyness and the Development of Embarrassment and the Self-conscious Emotions. R. J. Coplan, M. Weeks, Unsociability and the Preference for Solitude in Childhood. N. A. Fox, B. C. Reeb-Sutherland, Biological Moderators of Infant Temperament and its Relation to Social Withdrawal. Part 3. Personal and Interpersonal Processes. P. D. Hastings, J. N. Nuselovici, K. H. Rubin, C. S. L. Cheah, Shyness, Parenting, and Parent-child Relationships. K. H. Rubin, J. Bowker, H. Gazelle, Social Withdrawal in Childhood and Adolescence: Peer Relationships and Social Competence. J. B. Asendorpf, Long-Term Development of Shyness: Looking Forward and Looking Backward. Part 4. Contexts. M. Ann Evans, Language Performance, Academic Performance, and Signs of Shyness: A Comprehensive Review. X. Chen, Shyness-inhibition in Childhood and Adolescence: A Cross-cultural Perspective. B. H. Schneider, Y. Amichai-Hamburger, Electronic Communication: Escape Mechanism or Relationship-building Tool for Shy, Withdrawn Children and Adolescents? R. J. Coplan, K. Hughes, H. C. Rowsell, Once Upon a Time There Were a Blushful Hippo and a Meek Mouse: A Content Analysis of Shy Characters in Young Children's Storybooks. Part 5. Clinical Research, Practice, and Treatment. R. M. Rapee, Temperament and the Etiology of Social Phobia. M. P. Mychailyszyn, J. S. Cohen, J. M. Edmunds, S. A. Crawley, P. C. Kendall, Treating Social Anxiety in Youth.