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Publishers require Ebook conversion services to ensure that the content is optimized for the e-reader and not just a website. It will ensure that your book is easily read on an e-reader and looks nice. The publisher can use this information to decide whether or not to purchase your book. For more information, read the blog below.

https://www.atoallinks.com/2022/why-do-all-publishers-require-ebook-conversion-services/