Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: This is a fun book!

Being of fan of Rosenberg for some time, I was impressed bythis latests offering. It is a well crafted book that takes the oldcliche of real world people being thrusted into a fantasy world and adds a lot of surprises! The characters felt real and three-dimensional. I have to agree with the eariler comment about Ian Silverstein because he was a really well developed, interesting character. Looking forward to the second book The Silver Stone.