Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Something's fishy here

The book was OK. Just OK. I skipped around, wasn't terribly impressed. (Could be that it just wasn't my kind of book.) But all five of these 5-star reviews singing the praises of a book by Judy George -- chairman and CEO of Domain, the Boston-based home furnishings chain -- come from, yup, the Boston area. Well. Need I say more? Except that it irks me to no end to see these reviews, which people expect to be honest appraisals and not marketing ploys, skewed like this.