Bolshaya Kniga Award

Big Book (Russian: Большая Книга, romanized: Bolshaya Kniga) is a Russian literary award for best prose in Russian. The award is financed by the founders of the Center for the Support of Domestic Literature, Russian major businessmen and business structures. Acceptable candidates for the award are works of all prose genres, including memoirs, biographies and other documentary prose, written in or translated to Russian. The cash reward is as follows: First place — 3 million rubles. Second place — 1.5 million rubles. Third place — 1 million rubles.

From the Wikipedia article “Big Book (award)”, licensed under CC BY-SA 4.0.

Check the official rules of the Bolshaya Kniga Award 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.