Everything you need to understand or teach Busman's Honeymoon by Dorothy L. Sayers.
In addition to the important presentation of the proper roles of husband and wife, the book illustrates Sayers's usual conservative picture of the class system. After the murder is solved, there is a substantial coda in which Lord Peter deals with his scruples about playing God in exposing the culprit by engaging the best lawyer possible for him and yet remaining haunted by the memory of his complicity in the death, no matter how well deserved, of another man. But even this is not the end of the book's permutations since included in the epithalamion chapters at the end is the description of a visit of the newlyweds to Lord Peter's ancestral home at Duke's Denver, where Harriet sees a family ghost and apprehends how natural such a apparition is as a tangible illustration of the Wimsey heritage to which her marriage joins her permanently.(read more)