Top 3 issues:
- Color Contrast - Elements must have sufficient color contrast.
- Screen reader compatibility - Screen reader users must be made aware when the elements under "Books" are expanded and collapsed. "Author" and other modals do not convey that a modal has opened. When the "Author" modal presents, a screen reader user tabs through the elements, nothing is conveyed.
- Keyboard access - A keyboard only user must have the same functionality as a mouse user. When using only your keyboard to arrow thru the "Table of Contents" and "Stats" tabs, the graphs do not present.