Debrett's

Debrett's () is a British publisher, etiquette coaching, and financial advisory company founded in 1769 by John Debrett. The company is best known for cataloguing the lineage of nobility and landed gentry in the UK.

From the Wikipedia article “Debrett's”, licensed under CC BY-SA 4.0.

Large trade publishers generally accept manuscripts only through literary agents, while many independent and small presses accept direct submissions during reading periods. Before submitting anywhere, read the publisher's current guidelines, study recent books on its list, and never pay a reading or publishing fee to a traditional publisher.