Cussler has two “series” going. The ones with Dirk Pitt are mostly Spy vs. Spy with some really innovative equipment.
The other bunch of books has a number of characters, and in all of them, at some point, the good guys get rescued by Clive Cussler himself, so they can go on to finish whatever mission they’re on.
I don’t think “personal” relationships are quite the thing in these books. At least, I viewed them as probably less harmful than what we encounter on a daily basis.
(And I was going to ask about that pregnancy-thing...)
I won’t know for a couple of weeks, and it’s Not My Fault!