Kress also mentioned about online writing where the role of an author and reader cannot be distinguished.  Readers now are allowed to contribute for example Wikipedia.  And also where author/designer have no control of how and where a reader might use the entry point to the reading in contract with book author dictates the entry point.  I disagreed as I use the index of a book a lot especially to demonstrate to students there are cross-referencing between a book with another book of a different subject.  It’s just that the index is placed at the back of a book compared to website where readers are presented with the index at the homepage – the first page of the website.

A picture worth a thousand words – I could not have agreed more.