A. J. Sass (he/they) is an author whose narrative interests lie at the intersection of identity, neurodiversity, and allyship. He is the critically acclaimed author of the ALA Rainbow Book List Top 10 titles Ellen Outside the Lines, which was also a Sydney Taylor Honor Book, and Ana on the Edge, as well as the co-author of Camp QUILTBAG (with Nicole Melleby). All three books are Junior Library Guild Gold Standard selections.

A. J. is the author of the upcoming middle-grade book Just Shy of Ordinary (Little, Brown, 2024), and a contributor to the This Is Our Rainbow (Knopf Books for Young Readers), Allies (DK/Penguin Random House), and On All Other Nights (Abrams, 2024) anthologies. His debut picture book with illustrator Noa Kelner, Shabbat Is ..., also releases from Little, Brown in fall 2024.

When he’s not writing, A. J. figure skates and travels as much as possible. He lives in the San Francisco Bay Area with his husband and two cats who act like dogs. Visit him online at sassinsf.com and follow him @matokah on Twitter, TikTok, and Instagram.