This was a lot darker than the first one. I loved the continued use of puns. It was really cool to get Rex's point of view and I was not expecting the ending with Robin Hood--that shoooooook me. I loved the weaving of the King Arthur myths and Robin Hood. The academy for villains really cracked me up--in fact, good portions of this book gave me vague "oh! that's just like The School for Good and Evil" feels. The very ending left me confused and stunned. I don't know where this leaves the entire plot...or the next book! I'm quite excited for the sequel because the ending could mean so many things!