A very long time ago I was given the loan of five Terry Pratchett books by an acquaintance (now running a lab at the University of Manchester where they investigate protein synthesis). I made the mistake of reading three, one after the other and was unable to read another Pratchett for over 30 years. He was a great writer and a decent human being by all accounts, but I just find him far too whimsical (when I hear the likes of "Cohen the barbarian" I reach for my sick bag). Sourcery's fine: if you like this sort of book, this is the sort of book you'll like. Otherwise, meh and I'll be able to read the next one in a year's time maybe.