Experience with publishing books through Amazon KDP Amazon offers a Kindle Direct Publishing (KDP) platform service that allows individuals to publish and sell books for free. Books published through this KDP will be sold simultaneously on Amazon sites in 13 countries. I use this KDP (Kindle Direct Publishing) service to sell Kindle e-book and paperback. The books I have published have been selling an e-book vs. a paperback at a 3: 1 ratio. Royalty in e-books can receive 70% of the book's price (if the e-book is priced below $ 9.9) and the paperback can receive 60% in royalties. In fact, the price of a paperback is 2.5 times higher than the price of an e-book. In other words, selling one paperback may be more profitable than selling two e-books. Book prices can be arbitrarily set by authors for both the e-book and the paperback. However, in the case of the e-book, the book price must be set at $ 2.99 to $ 9.99, so 70% of the book's price will be provided royalties,...
http://amazon.com/author/charlychoi