Check those emails to see if you might have received a credit to spend on Amazon Kindle books! The credits resulted from an eBooks Antitrust Settlement.
If you didn’t receive an email, or perhaps you accidently deleted it, you can check to see if you received credits by logging into your Amazon account and heading to the Knidle eBooks page.
You don’t have to do anything to claim your credit, it will already be added to your Amazon account, and it will not expired until March 31, 2015.
Did you receive a credit from Amazon?