Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Feat of Endurance

I was hoping that Clancy would rebound from whatever funk he fell into with Red Rabbit, getting back to the present timeline with Teeth of the Tiger. Unfortunately, The Teeth of the Tiger is plagued by too many references to the Jack Ryan mythology, too much exposition, and not enough of a reward plotwise. By far, this is the thinnest plot of any Clancy novel, and getting through the 431 pages felt like a feat of endurance.