Fran and Ken Stein mysteries

"After losing their parents when they were just babies, private investigators Fran and Ken Stein now specialize in helping adoptees find their birth parents. So when a client asks them for help finding her father, with her only clue a rare ukulele, the case is a little weird, sure, but it's nothing they can't handle. But soon Fran and her brother are plunged into a world where nothing makes sense - and not just the fact that a very short (but very...