There was a series of books that I read in the 80's about a girl and
an older guy. The girl was really sexy and I think a shoplifter.
"Luna" may have been in the titles. There was a movie version but the
girl was Asian in the movie version. I think they solved crimes or
something, maybe not. If this helps, I saw the movie at M.I.T. in the
Clarification of Question byciniscene-ga
I think "Delacorte" may be a key, either the author, publisher or a
name of a character.