Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Great Thriller With Some Unsatisfying Elements

Overall, this is a great book. It's well-written and it's a page-turner. But, I wish Silva would keep his main character out of romances because they are not believable. I was told that, all of a sudden, he had feelings for Anna, but I saw no evidence of this in the book. They got closer due to circumstances, but I saw a bond of kinship, at best. Anna Rolfe is basically a female Gabriel Allon so a feeling of sympatico between them is understandable, but I didn't feel romantic vibes coming from them at all.Since the author doesn't seem particularly strong at writing such relationships, he should probably leave them alone. As it is, they are very weak tea.