in the Dada movement of the interbellum period

Just a nit, but dada started in Zurich during the First World War, and it pretty much exhausted itself before the first decade of the entre deux guerres. Two good books on pomo fiction are Brian McHale's Postmodernist Fiction (1987) and Constructing Postmodernism (1992).

Ceci n'est pas un seing.