The cover has a quote from Neil Gaiman, comparing it to Dahl, Pratchett and Adams. Dahl and Pratchett it isn't, though if you enjoy them you will probably enjoy this. Adams it is, a bit, along with Jerome K Jerome, in the way a paragraph clearly labelled as narrative, moving the story forward, suddenly has a quip which makes you double take, then grin, or at least laugh. But, in literary terms, Swift is the grandfather of this book: Terra is a modern Gulliver, apparently visiting an alien country but often commenting on home.
This is definitely a Young Adults book - the plot falls apart of looked at with a Hard Science eye - it is also very enjoyable for adults. The level of sophistication is about the same as. Dr Who story - and we all enjoy those, don't we? - but the level of human, and alien, engagement much higher.
This is a book that engages you. You will have an expression on your face as you read it: often a smile, sometimes sadness, sometimes anger. Mitch Benn's world does not leave you untouched.