When Aidan Became a Brother

By Kyle Lukoff
Illustrated by Kaylani Juanita

Hardcover: $19.95


This sweet and groundbreaking picture book, winner of the 2020 Stonewall Book Award, 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.

Download the When Aidan Became a Brother book résumé to advocate for keeping this essential book readily accessible to young people.

Download the When Aidan Became a Brother praise sheet.

Explore the reading guide and learning activities created by the Anti-Defamation League, or educator lesson plan and activities from Reading Is Fundamental.

Check out the booklist LGBTQ+ Book List and Resources and order the collection.

About the Creators

Thumb_kyle_lukoff_headshot Kyle Lukoff - Author

Kyle Lukoff writes books for kids and other people. His titles include Too Bright to See, a Newbery Honor winner and a finalist for the National Book Award; another middle-grade novel, Different Kinds of Fruit; and many picture books and early readers, including the Max and Friends series. A longtime bookseller and children's librarian, he now writes full-time from his home in Philadelphia. Find him on the web at and on Twitter as @KyleLukoff.

Thumb_kaylani-headshot Kaylani Juanita

Kaylani Juanita describes her mission as an artist as “supporting the stories of the underrepresented, and creating new ways for people to imagine themselves.” Her work has appeared at the Society of Illustrators and on the BBC website, as well as in her first picture book, Ta-Da!, written by Kathy Ellen Davis. She lives in the San Francisco Bay Area. Look for her online at and @kaylanijuanita on Twitter and Instagram.