If you want to build up a collection of great ebooks on your Kindle without spending a dime, Red Ferret has a simple but neat trick to using Amazon’s individual RSS feeds and our favorite web automator, IFTTT.
from Lifehacker http://feeds.gawker.com/~r/lifehacker/full/~3/u-83Ml4O4rE/get-email-alerts-for-free-kindle-ebooks-in-favorite-gen-1473930005