JD Robb's In Death Series

This is a really long series. A New York detective falls for a billionaire who started off on the wrong side of the law. I like it that the detective is embarrassed by his wealth but loves the coffee he stocks. It is set in the future so it has that going for me, too. Both the detective and the billionaire had really rough childhoods but made something of themselves...different somethings. She wants rules and he wants stuff. The detective stories are interesting but the characters are great.