I adore Becky Chambers's books: They are cozy, extremely character focused, have well-drawn alien cultures that feel both foreign and believable and she manages to make me care so much for the characters.
This one is mostly about intercultural contact with everyone bringing their own baggage with them. The author is so good at creating these species and making the characters good representations of them but also very much their own people. I also really loved getting a POV from a minor character from the first book. 
It's charming, emotional, occasionally funny, the characters are amazing and being able to write a compelling book about people basically waiting for a couple of days is a achievement in itself.