I don't remember watching the movie so the plot was brand new to me. That being said, it was a very technical book. I learned more about submarines and sonar then I ever wanted to know. I would have liked the book better had there been more action, less explaining, but I get that it was there to make the story seem more credible. Some Soviet captains decide they want to defect to America so they take their submarine and head towards the US. What happens next is a deadly game of cat and mouse and poor CIA agent, Jack Ryan gets dragged into the thick of it. An entire fleet of Soviet warships and submarines chase after The Red October and America and England work together to come up with a plan to meet this sub before it gets blown out of the water. It was an alright book, but I have a hunch that I would enjoy the movie even better. I love me some Harrison Ford.