I have not read the books. Therefore I enter as a virgin into the land of Grantchester. So, to me, it is a pleasant, light, somewhat funny, charming show. If we accept the idea that the Director meant to make the show in that way, I think that it is successful. I think the acting is excellent, and the stories are within reason, and interesting,but not hard-hitting because the show is not meant to be "film noir". It is light entertainment. I don't have to really believe that a Vicar, Sidney Chambers (James Norton),is regularly solving murders with his friend, Geordie, the police detective. I need not believe that a seemingly small town would have so many murders--one or more weekly--OK, let's say the time frame is two months apart, still.....you get it. So I give this show a 9 because I do enjoy it. I particularly like the acting of James Norton as the Vicar, but all are good.