For most indies, book marketing and promotion is an essential part of our business plan – almost as important than the writing itself.  Bearing that in mind, I thought it was important to have a list of sites that could be used for marketing/promotion purposes.
 
1) Bmi Books: https://bmibooks.com   Starting from $10 onetime fee
2) OltoApp: https://olto.app/oltobookspagination.php (Free and Paid)    
3) Olto Recommended Books: https://oltobooks.com/  wait some time for approval - Once approved you will get an email
4) Books WiFi: https://bookswifi.com/
5) WordLikes: https://wordlikes.com - is a site that generates interest for books not only through their email list of over          410,000 subscribers but also through a huge network of blogs.
6) Best Reads(Free & Paid Featured books): https://bestreads.app/