Kindle Direct Publishing

Kindle Direct Publishing (KDP) is Amazon.com's e-book publishing platform launched in November 2007, concurrently with the first Amazon Kindle device. Originally called Digital Text Platform, the platform allows authors and publishers to publish their books to the Amazon Kindle Store. Authors can upload documents in several formats for delivery via the KDP website and charge between $0.99 and $200.00 for their works. KDP accepts books in 44 languages. In 2016, Amazon also added a paperback option, and in 2021, a hardback (case laminated) option, both of which use print-on-demand technology.

From the Wikipedia article “Kindle Direct Publishing”, 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.