The Fifth Elephant (by Terry Pratchett)

Slowly re-reading my way through Terry Pratchett’s lengthy Discworld series, I reached #24, ‘The Fifth Elephant’. I read this aloud to my sons nearly twenty-two years ago, not long after it was published, but I had not read it since. So, unsurprisingly, I had no recollection at all of the plot. 

And it’s one of the more confusing plots, in my opinion - not that any of them are straightforward. Sam Vimes, the Duke of Ankh and commander of the City Watch is the star of the book, although there...