Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Wiltse is Top Shelf

Very puzzling to me that David Wiltse is not much better known in the Mystery/Crime Fiction genre. Everything I've read by him thus far has been very impressive, and this novel was no exception. I really think he belongs on the top shelf of crime fiction authors. John Becker, the FBI agent who features in this tale (and others in the series), is a fascinating, memorable character, and Wiltse weaves a mesmerizing, addictive plot into the mix. This one has plenty of political intrique, an international angle, and some horribly grisly crimes. Skillful plotting ensures that you will read this novel very quickly, caught up in both the crime angle and the endearing elements of Becker's character.