The EReader Cafe claims to be the spot for free and bargain e-books. They do not publish the price only noting that it is free or bargain. The site charges authors for featuring a book. The right side of their webpage has advertising.
The site is associated with Amazon but tags only books that are bargain priced.
When you create an account at this website, you can customize the daily email by selecting the genre you would like to receive. Your preferences can be updated at any time.
EReader IQ is a great site for finding free and cheap books. The site says that is is associated with Amazon, but I did not see a tag in their links.
This site has several search features and ways you can customize looking for books in a price range, in a specific genre, discount and more. You can even create a list of books to watch and you will receive notification when the price lowers. You can also see the history of pricing for a book.
This is one of the better sites to visit for variety. You can subscribe to a daily email also.
The Fussy Librarian is another site for free and bargain books. Most of their books are paid advertisements by authors and will include an end date for the deal. They carry books for Kindle, Nook, Apple, Kobo, Google Play and other sites including author websites.
You can subscribe to two newsletters – one for free books and one for bargain books.
I have not received consideration to tell you about these sites.
 
Kindle Daily Deal Link
Audible Daily Deal Link (scroll down the page)
Daily Gold Box Deal Link
 
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