For me, visual indexing is only important for text books or technical books. For any other materials (novels?), that's unimportant. So for technical stuff I pr

For me, visual indexing is only important for text books or technical books. For any other materials (novels?), that's unimportant. So for technical stuff I prefer to read a PDF version of the eBook (that is the precise copy of the actual book), and for novels I don't mind using an EPUB format, where the layout is not exact.