Kindle Unlimited as a Search Engine

Kindle Unlimited as a Search Engine Kindle Unlimited is one of the most popular e-reading subscription services. With it, readers can access a huge library of books and read them for free. Kindle Unlimited as a Search Engine: The service has been around for more than five years and has seen its share of controversies with publishers. Despite this, the service is still going strong. Amazon launched Kindle Unlimited in July 2014 with a monthly fee of $9.99 per month, which included access to over 1 million e-books from over 100,000 different titles.