Some routine tests run on the interface:
- W3C Markup Validation Service: 32 Errors, 12 warnings.
- W3C mobileOK Checker: Score of 0 out of 5 (lowest possible score). Failures per severity: critical 4, severe 2, medium 2, low 5.
- Achecker Accessibility Review for WCAG 2.0 (Level AA) Guidelines: , .
There is an audio option, which has very clear narration and has the option of setting the speed. But I had difficulty operating the audio interface and it does not appear to exactly match the text in the book.