In this joyful and impactful picture book, a transgender boy prepares for the first day of school and introduces himself to his family and friends for the first time. Calvin has always been a boy, even if the world sees him as a girl. He knows who he is in his heart and in his mind but he hasn't yet told his family. Finally, he can wait no longer: "I'm not a girl," he tells his family. "I'm a boy--a boy in my heart and in my brain."...