I am reading the preview pages of a book on Amazon (www.amazon.com/Elements-Programming-Interviews-Questions-Solutions/dp/1479274836/ ).
There are many clickable (i.e. with links to the main text) chapter and section titles in the table of content, but when I read a fewer number of pages, I can't access any more pages, and the chapter and section titles in the table of content become non-clickable. E.g. Section 18.12 in the table of content was clickable before (see http://i.imgur.com/fwjLKzM.png), but not after (see http://i.imgur.com/XNmCscf.png), and the majority of the books becomes not previewable (see http://i.imgur.com/PvNWAOz.png).
Do different IPs have different sets of previewable pages of a book?
Are the previewable pages of a book different for different Amazon accounts?
Does Amazon change the previewable pages of a book over time? E.g., If I wait for a week, a month, or some length of time, will the previewable pages for my account change?
What are some other factors?