Michael Faraday Prize

The Royal Society Michael Faraday Prize and Lecture is awarded for "excellence in communicating science to UK audiences." Named after Michael Faraday, the medal itself is made of silver gilt, and is accompanied by a purse of £2500.

From the Wikipedia article “Michael Faraday Prize (Royal Society)”, licensed under CC BY-SA 4.0.

Check the official rules of the Michael Faraday 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.