Users navigate ebooks in various ways: paging through buttons or screen taps, tabbing through paragraphs, or jumping between chapters via the reading system’s navigation or the ebook’s internal links. To ensure a comfortable reading experience, all these methods must be supported and function predictably.

Objectives

• Facilitate navigation across different reading systems and access methods.
• Improve content accessibility for users with disabilities.

Implementation

• Organize content in a logical reading order.
• Provide a machine-readable Table of Contents (EPUB Navigation Document).
• Include a human-readable Table of Contents within the ebook content where possible.

Control

• Verify the logical sequence of the document, specifically using keyboard navigation.
• Ensure the Table of Contents is available and functional within the reading system.