I have a first run copy of " The hunt for Red October " This was before Tom Clancy wrote the screenplay for the movie. "Red Storm Rising " was great as well. I have all of them . If you enjoy " techno thrillers " like that of Tom Clancy, check out Stephen Coonts.
Stephen was a A-6 Intruder attack / strike aircraft pilot and is the real deal. Stephen Coontz wrote the book, Flight of the Intruder . A movie was made of it as well. The film stars Brad Johnson, Danny Glover and Willem Dafoe . Check it out
https://en.wikipedia.org/wiki/Flight_of_the_Intruder
There is also Clive Cussler. I liked the book he wrote " raise the Titanic "
https://en.wikipedia.org/wiki/Raise_the_Titanic!