Following the news that he’s going to become a big brother, Aidan helps his parents choose baby clothing, paint the nursery, and consider names. Aidan doesn’t like when people ask if his mom is having a boy or a girl because when Aidan was born, everyone thought he was a girl. As Aidan got bigger, he knew he wasn’t. “It was hard to tell his parents … but it was harder not to.” When he’s worried about being a good big brother, his mom reminds him that they didn’t know everything when Aidan was born, but he helped them learn. “You taught us how important it is to love someone for exactly who they are.” Aidan is mixed race (his mom looks Black, his dad Asian) in art full of playfulness (the clothing patterns!) and abundant warmth. Buoyant illustrations show Aidan’s clothing choices range from dinosaur t-shirts to bowties, baseball hat to head wrap, shorts to frilly pinafore, in a story beautifully affirming gender identity as a matter of internal understanding and self-knowledge rather than an assignment based on physical appearance, and gender expression as open and expansive rather than culturally proscribed. (Ages 4–8)

This sweet #ownvoices picture book celebrates the changes in a transgender boy's life, from his initial coming-out to becoming a big brother. When Aidan was born, everyone thought he was a girl. His parents gave him a pretty name, his room looked like a girl's room, and he wore clothes that other girls liked wearing. After he realized he was a trans boy, Aidan and his parents fixed the parts of life that didn't fit anymore, and he settled happily into his new life. Then Mom and Dad announce that they're going to have another baby, and Aidan wants to do everything he can to make things right for his new sibling from the beginning--from choosing the perfect name to creating a beautiful room to picking out the cutest onesie. But what does "making things right" actually mean? And what happens if he messes up? With a little help, Aidan comes to understand that mistakes can be fixed with honesty and communication, and that he already knows the most important thing about being a big brother: how to love with his whole self. When Aidan Became a Brother is a heartwarming book that will resonate with transgender children, reassure any child concerned about becoming an older sibling, and celebrate the many transitions a family can experience.