Instruct: Classify the given review into positive or negative sentiment.
Query: A wonderful surprise!

I was reading my kid brother a bedtime story when he suggested that we should try the Harry Potter books next. I was doubtful, having never heard of them before, but when he left one lying on the kitchen table I had a look, and the next thing I knew, I was halfway through the book! I couldn't put it down. Harry's unusual adventures caught my imagination. Plenty of twists and laughs, as well as suspense and tension. And the characters are great! Since then, I've heard a lot about the series, all wonderful, and many comments on how much the parents seem to like them too...