I recommend the book first, then watch the movie. Tom Clancy is incredible, or better yet start with the first Jack Ryan series, my favorite has to be “The Cardinal of the Kremlin”. The book “Sum of All Fears” needed a disclaimer added to the book because it went into such detail about how an Atomic bomb is built that people were expressing alarm.

I recommend the book first, then watch the movie. Tom Clancy is incredible, or better yet start with the first Jack Ryan series, my favorite has to be “The Cardinal of the Kremlin”.