A Hard Day's Fright Pepper Martin Mystery Series, Book 7.

What happened to a teenager named Lucy one night in 1966 after a Beatles concert? She rushed the stage, kissed Paul, started home with her friends, and was never seen again-until cemetery guide and unintentional PI to the dead Pepper Martin sees her as a ghost. Lucy's spirit can't rest in peace until her body is found and buried. But how will Pepper track down a missing corpse after forty-five years?