New York Times bestseller Spencer Quinn returns with a laugh-out-loud series about the most epic rivalry of our time . . . Arthur the dog vs. Queenie the cat.From the outside, Queenie the cat and Arthur the dog appear to have a lot in common. Both pets live in the charming Blackberry Hill inn. They both love their humans, twins Harmony and Bro. They both have a fondness for sausage.But that doesn't change the fact that they are mortal...