His Grace, Commander Samuel Vimes, Duke of Ankh, is off to take a vacation at the country estate. 
 And of course, he finds himself knee deep in fertilizer. 
 Once again PTerry is poking at the social constructs that shape our lives. We return to what seems to have become a reoccurring theme in his Discworld, the equality of all sentient creatures and the ridiculousness (and danger) of social class systems. Spiked with his pithy commentaries and the expected plethora of sarcastic footnotes, Mr Pratchett once again delivers as he puts the eyebrows on microcosmic small town incestuous legal structures. 
 In shorter words, it's funny, fun, and full of adventure, sarcasm, excitement and excrement. Oh and a Riverboat. Go grab it.