Although Van Dine was one of the most educated and cosmopolitan detective writers of his time, in his essays he dismissed the idea of the mystery story as serious literature. He insisted that a detective novel should be mainly an intellectual puzzle that follows strict rules and does not wander too far afield from its central theme. He followed his own prescriptions, and some critics feel that formulaic approach made the Vance novels stilted and caused them to become dated in a relatively few years.