Your e-book price (on Amazon, Barnes & Noble, Google Play, etc.) can be changed by your project manager to any price, including zero, for promotions, BookBub deals, etc. Please inform them at least two weeks ahead of time, as it often takes a few days for prices to change, as well as to go back to normal. Please keep in mind that we cannot control the exact time of a price change, so it may change a few days before the date of your sale or promotion.