Instruct: Classify the given review into positive or negative sentiment.
Query: It could beget an obsession

What an amazing book! It's scary, romantic, very very sad... I would highly recommend it to anyone who loves that sort of blurry line where history and legend meet, the supernatural and stuff like that. The characters are so well drawn one could believe they're real (I am quite in love with Gwyn) and this book really got me interested in Wales and Welsh history...also with Welsh/English relations. (I almost joined Plaid Cymru, but I didn't because it would be totally pointless seeing as how I'm Canadian) Uh, yeah, read this book! It will, as they say, sweep you off your feet!