Also known as KU, this is the Netflix of ebooks, owned by Amazon. You pay a monthly subscription fee and can read all the ebooks that are in the program. You won’t find a lot of big, traditionally published authors here, but it’s great for genre writers, especially romance and fantasy, especially if you write thick books. The downside is, KU is exclusive, meaning if you are in the program, you can only sell your ebooks on Amazon.