Haven't read any Tom Clancy. Suppose I should remedy that some day...though I'm not much for super detailed scientific jargon.
On the other hand, I love Michael Crichton in spite of the technical jargon...so maybe I'd enjoy Clancy. Crichton's State of Fear is *excellent*.
Clancy's specialty is the inner workings of the defense and intel agencies. It's scary what you can compile from open sources. My caution about his stuff is that the language can be a bit coarse and the stories are very violent.
I also enjoyed "Debt of Honor" and the sequel, "Executive Orders".
I enjoyed "State of Fear" immensely!