Heinrich Heine Prize

Heinrich Heine Prize refers to three different awards named in honour of the 19th-century German poet Christian Johann Heinrich Heine: Heinrich Heine prize of Düsseldorf Heinrich Heine prize of the Ministry for Culture of the former GDR, which was assigned until 1990 Heinrich Heine Prize of the "Heinrich-Heine-Gesellschaft" in Hamburg

From the Wikipedia article “Heinrich Heine Prize”, licensed under CC BY-SA 4.0.

Check the official rules of the Heinrich Heine Prize for the current eligibility window, accepted formats, residency or language requirements and any entry fee. For most established prizes the publisher submits on the author's behalf, often with a limit on entries per imprint.

If you are self-published, look for an explicit statement that independently published books are accepted, and budget for entry fees and copies for judges.