Use logical headings, descriptive link text and a reading order that makes sense without visual styling. Add concise alternative text to informative images and mark decorative images appropriately. Reflowable text should remain usable when readers increase font size or change device orientation.
Test the ebook with accessibility tools and more than one reading app. If the book includes complex tables or images, provide context in the surrounding text. Accessibility broadens the audience and improves the reading experience for people using assistive technology.