I really enjoyed this book! The action was fun, and the interactions between the Doctor and Donna are golden. I thought Donna's characterization in particular was excellent! I will say, the book is trying to use a sort of heavy handed metaphor with robots to discuss prejudice (common in sci-fi), and while I think the message is good, it was executed in a somewhat awkward manner. I’d still recommend this book, just something to keep in mind expectation wise.