One of her top ten conservative novels, as shared at the Guardian:
Gaudy Night (1935) by Dorothy L SayersRead about the other entries on the list.
Sayers’ unquestioning acceptance of the social hierarchy, and her passion for Lord Peter Wimsey’s background and social assumptions make her a conservative novelist. Gaudy Night, a great feminist novel, also advocates the conservative status quo. The servants’ loyalty to the college is a metaphor for loyalty to a feudal society, even if the dons wear frocks. And order (it is a detective novel, underneath the romance) must be restored: the most conservative impulse of all.
Gaudy Night is one of Anna Quindlen's favorite mystery novels.