Koranyi examined German literature in terms of genre, form, content, and motifs as well as looking at it historically by author and epoch, (especially on Goethe).

In 1983 his dissertation Autobiographik und Wissenschaft im Denken Goethes at the Philosophical Faculty of Language and Literature II of the Ludwig Maximilian University in Munich was accepted.

[2] From 1983 to 1986 Koranyi worked in the Department for Classics Editing at the dtv Verlagsgesellschaft, first as a publishing trainee, then as an editor.

In 1985 he was an editor of the novel Gabriele written by Johanna Schopenhauer and in 1987 he edited the novel Laudin und die Seinen by Jakob Wassermann.

Additionally to his work as lecturer and expert of German Christmas culture he published the following titles: Reclams Weihnachtsbuch.