Instruct: Classify the given review into positive or negative sentiment.
Query: a pleasant surprise

As always, Terry Pratchett's work is charming yet profound and can be read on several levels. I had never read one of his "tweenie" books before (had never heard the word; someone had to define it for me). Since his Alzeheimer's was diagnosed and announced, I try to read everything that he has it print.His characters are real and fully developed, the entire video game mind-set is perfectly represented here. I was enchanted by this book.