Henry believes that someday, something awesome will happen—everything will turn out all right and all her problems will disappear once her letter arrives, welcoming her to magic school. So even though puberty is already here with changes (like her voice deepening and hair growing in places she does not want), she also knows it's only a matter of time. After all, hundreds of books have said so.
But when the letter finally comes on Henry's thirteenth birthday, it is not addressed to her, but to her sister.
When The Letter Comes is a short story with a YA trans protagonist that embraces the experience of those left behind, who must find their own way in the world—magic or not.