Ever since its initial publication in 2008, The Transgender Child, co-written by Gender Spectrum founder Stephanie Brill, has been lauded as the most trusted source of information for families wanting to understand and affirm their transgender, gender-expansive, or nonbinary child. Recently, The Transgender Child has been updated to include expanded coverage of gender development, affirming parenting practices, mental health and wellness, medical decision-making, legal advocacy, and how best to ensure school success.