The longer your book is available for pre-order, the more time you have to send readers to Amazon and the other stores to accumulate orders. All these orders count as sales on your release date, giving you a good chance at cracking some top-100 best seller sub genre lists in sites like Barnes & Noble and Powell’s. Note: this is not the case with Amazon’s best selling list. They count pre-sales orders on the day it’s actually ordered, not all combined on the eventual release date.
You’ve written your book and completed the hard work of producing it. Now, it’s time to release it to the world. In other words, it’s time for a book launch party.