This is one more for the adults, a book about folklore from all over the world and how Terry Pratchett has changed it for his own creation.  Each chapter deals with a group of beings, or a place and its beliefs, or a festival, and the Discworld variation as compared with our equivalents.  This sounds simple enough and perhaps not terribly exciting but this is a highly readable book, and a great way to get into folklore if you are not already au fait with it.  Ms. Simpson is a folklorist and thus the book comes with a generous bibliography, although if you are hoping for websites and a list of tale types and motifs you will have to go on wanting.  Don’t be too despondent though if you think you know all about the subject and are looking for something truly exhaustive, as this book is a delight.  For one thing, it makes for entertaining reading as it ought to — it is a book about ourselves, and the tales we have told each other since we lived in caves.  I’ve read a great many books on folklore and this does not always get pointed out.  One for the keeper shelf for all Discworld fans (and that is a lot of people).