“Jules Verne in Hell: A Letter to the Editor From the Late Writer,” Ludwig Hevesi, 1906 – Surreal, humorous short.
Comments: An early example of generic self-reference. Available in The Black Mirror. A review of this book (and German sf) is available on i09, German SF Through Two World Wars And The Berlin Wall. Of this story, the review notes: “This is a hysterical satire, set in the Infernal Reaches, that would not be out of place in a comic book from DC/Vertigo.”
Author: Wikipedia: “Lőwy Hevesi Lajos, or Ludwig Hevesi (December 20, 1843, Heves, Hungary – February 17, 1910, Vienna) was a Jewish Hungarian journalist and author.”