One important discovery tool on Amazon is the Hot New Releases list, which displays the top-selling books in each genre and sub-genre released in the last thirty days. Getting on the first page of this list for your genre or sub-genre can be a great driver of sales, but readers don’t seem to browse past the first page in serious numbers. (In fact, it’s doubly important in historical fiction, which has no sub-categories to aid visibility, and where you need to be ranked at regularly below #2,000 to #3,000 to scrape in at the outer reaches of the chart.) - http://davidgaughran.wordpress.com/2012/04/09/jodi-picoult-and-the-myth-of-the-segregated-marketplace/