BookBub is a service that might be of interest to members. It’s free. Anyone can join. Each day you get an email with some book selections. The books cost either “free”, $.99, $1.99, or $2.99. You don’t have to buy a book or any minimum number of books. I go weeks without getting a book, or only a free one, but they don’t drop you from the service.
If you would like an invitation to join BookBub please contact me at email@example.com and I will forward you the email.
I have been using Book Bub for at least two years now. One can make their purchases on Barnes and Noble and Amazon and this also includes e-Books. I receive an email from Book Bub every day and have made several purchases. They tailor their offerings according to your interests and prior purchases.