Accessibility

Our commitment

This is a book about health. It would be a poor showing if the website itself were hard to use. We aim to meet WCAG 2.1 Level AA and treat any shortfall as a bug rather than a nice-to-have.

What we have done

• Every interactive element is reachable and operable by keyboard alone, with a visible focus ring.
• Menus, drawers and dialogs trap focus while open and return it when closed.
• Colour contrast meets AA for body text and interface text.
• All meaningful images carry descriptive alternative text; decorative artwork is hidden from assistive technology.
• Text resizes to 200% without loss of content or function, and the layout reflows down to 320px.
• Animation is suppressed entirely for anyone whose system requests reduced motion.
• Live regions announce search results, cart changes and form outcomes.
• Chapter illustrations can be enlarged, and each carries a written caption describing what it shows.

Known limitations

Some embedded third-party content — payment provider frames and social video embeds — is outside our direct control. We choose providers with accessibility support where we can.

Tell us if something is wrong

If you meet a barrier anywhere on this site, please tell us. Describe what you were trying to do and what got in the way. We will reply within one working day and fix genuine barriers as a priority.