It doesn't have much substance to it but it is enjoyable nonetheless.
Bailey Ruth is in heaven and she decides to apply to the Department of Good Intentions to go help someone "in big trouble" back on earth. She is sent down and ends up in her hometown and the people she is helping are actually her relatives a few generations later. A murder has been committed and the body is on the porch of Kathleen Abbott, the rector's wife. Bailey Ruth has to try to figure out how to help Kathleen without alarming humans. She is supposed to be on earth but not of it. OK, right away she is in trouble; she appears and disappears, she carries physical items while invisible resulting the in the objects floating about. She follows the police chief about, impersonates a police officer and hides evidence. But she also saves the day, of course, in this very sweet novel of a ghostly and innovative detective. The ending is also very well done, not boring at all.