Book excerpt: Ever since its initial publication in 2008, The Transgender Child has been lauded as the most trusted source of information for families wanting to understand and affirm their transgender, gender-expansive, or nonbinary child. Utilized around the world and translated into multiple languages, The Transgender Child has won accolades from medical and mental health professionals, teachers, and, most especially, from parents. Authors Stephanie Brill and Rachel Pepper have now thoroughly revised and updated their ground-breaking classic with expanded coverage of gender development, affirming parenting practices, mental health and wellness, medical decision making, legal advocacy, and how best to ensure school success, from preschool through the high school years. Drawing upon their extensive joint expertise as pioneers in the field of gender affirming care, and enriched with the wisdom of parents who’ve already walked this path, as well as the voices of multiple professional experts, Brill and Pepper once again provide a compassionate and educational guide for anyone who cares about, or works with, a child who falls outside expected gender norms.