Nils Holgersson Plaque

The Nils Holgersson Plaque is an award given by Swedish Library Association. It was established in 1950, and named for the book The Wonderful Adventures of Nils by Selma Lagerlöf. It is an annual award given to the author of the best children's or young people's book in the Swedish language.

From the Wikipedia article “Nils Holgersson Plaque”, licensed under CC BY-SA 4.0.

Check the official rules of the Nils Holgersson Plaque 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.