"view page source" on chrome and get the page data in Python -

there cases when right click on page , choose "view page source" shows not contain original page data. example let's @ page:

http://www.amazon.com/best-sellers-books-biographies/zgbs/books/2/ref=zg_bs_nav_b_1_b#1

if in chrome right click , @ page source contains example "the wright brothers".

however, if go next page as:

http://www.amazon.com/best-sellers-books-biographies/zgbs/books/2/ref=zg_bs_nav_b_1_b#2

and same thing, expect see example: "unbroken: world war ii" there not there.

what happening here , how content of second page rendered then?

thanks help.