Becky Chambers’ latest novel, “The Galaxy and The Ground Within,” is the final book in her Wayfarer series, which is about aliens, humans and AI trying to make their way through the galaxy and find common ground. Some of the characters in her books may seem fantastical and strange, but the conversations between them often revolve around familiar issues like identity, gender, family structure, and politics. We talk about why she’s closing this chapter in her writing career, even though the Wayfarer series could’ve gone on indefinitely, and what she has planned next.