National Book Award

The National Book Awards (NBA) are a set of annual literary awards in the United States. At the final National Book Awards Ceremony every November, the National Book Foundation presents the National Book Awards and two lifetime achievement awards to authors. The National Book Awards were established in 1936 by the American Booksellers Association, abandoned during World War II, and re-established by three book industry organizations in 1950. Non-U.S. authors and publishers were eligible for the pre-war awards. Since then they are presented to American authors for books published in the United States roughly during the award year. The nonprofit National Book Foundation was established in 1988 to administer and enhance the National Book Awards and "move beyond [them] into the fields of education and literacy", primarily by sponsoring public appearances by writers.

From the Wikipedia article “National Book Award”, licensed under CC BY-SA 4.0.

Check the official rules of the National Book 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.