Accessibility Statements

https://www.gov.uk/government/publications/sample-accessibility-statement/sample-accessibility-statement-for-a-fictional-public-sector-websiteUK, EU and US legislation all require an accessibility statement to be published on the organisational website. See relevant legislation sections for details, templates, guidance and examples.

The purpose of an accessibility statement is to communicate with the public, especially your end users or readership, about the accessibility of your book files and publisher web site. It is where you detail compliance with standards, parts that are not yet accessible, and the plans you have to remedy that. It is also where you give contact details to make individual accessibility requests. This lets readers know about the accessibility of your content without having to check it out themselves, and builds trust in them that you are handling these issues over the long term.

Because of all these benefits, even if it's not a legal requirement to put a statement in place, it is still recommended to have something that communicates the above available publicly.