In the EPUB version we repeatedly use the phrase "To zoom, double-tap the image or click here" -- and the text "click here" is used as the descriptive link. That's not a good accessibility practice, and I suggest that we don't model the practice in the Sample Book. [See What’s wrong with using "Click Here" links? for background.]
In the EPUB version we repeatedly use the phrase "To zoom, double-tap the image or click here" -- and the text "click here" is used as the descriptive link. That's not a good accessibility practice, and I suggest that we don't model the practice in the Sample Book. [See What’s wrong with using "Click Here" links? for background.]