Completely free for tracking book sales from Amazon (all domains).
Once you type in your book name, the site provides sales information:
You can also download Excel Spreadsheet format or check out Twitter and Blog searches.
Completely free sales ranking with searchable items.
You can search by your author name or book name.
I've also found this site useful for researching publishers and their sales ranks for recently released books.
Melinda Dozier is a contemporary romance writer. Her three debut novels were released in 2013: The Boy Next Door and Time Changes Everything from Entranced Publishing, and Breaking the Rules from Crimson Romance. Her latest release, Love and Other Games: Trouble With Gold was released last week from Swoon Romance. You can find more information at her website:www.melindadozier.com