Over the Edge by Suzanne Brockmann
The main character named Suzanne Brockmann had numbers of the romantic suspense. There are the two people who are caught in the call of the duty and the lure of the destiny.
The second character named Lieutenant Teri Howe was the strong and the highly skilled person. Chief Stan is ready to take the difficult challenges. This mission was very daring and dangerous. There was the line between the friends and lovers that were beginning to blur.
Published September 27th, 2005 by Ballantine Books (first published 2001)