Need recos for a literature lover friend preferably by female writers

So it’s one of my closest friends’ birthday. And she is a sort of a literary connoisseur with a master’s in English literature and a theatre degree (which is where we met.) I am a reader myself but she is a regular reader. She reads all the time. She has read all the classics and probably all the famous contemporary works as well.

What would be the best piece of literature to gift somebody like her? A poetry book would also work but preferably by a female writer.

Something for the keepsake 🙂