The third section, on assessment, constitutes the core of the book and includes chapters on infancy, school age, and adolescence and transition age, plus overview chapters on caregivers and family. Presented are an array of topics, including normal development (motor, cognitive, social, and so on) and behavioral patterns (such as attachment issues and aggression), and a primer on mental illnesses. Depression, we are told succinctly, is often “not expressed in words but rather in behaviors.” Oppositional behavior can be “a reflection of an unmet need,” with recognition of the bidirectional nature of problems between youths and parents. Resiliency is underscored; for instance, Cornett points out that siblings can enable youths to “develop and practice an emotional language” and that recreational activities can promote cooperation and negotiation skills. A recurrent theme is that deficits and disorders can be overcome and that strengths and talents should not be overlooked.