Amazon recently made some changes to their pre-order process that give authors more flexibility.
Back in 2014, in what was considered a great leap forward for self-published authors, Amazon provided the ability to offer books for pre-order. Previously, only big publishers had that option on Amazon. While this was a great move, the pre-order process on Amazon had some strict requirements. Book files had to be uploaded ten days prior to the book’s on-sale date, and if you missed the deadline (either because you failed to finish the book or because you simply forgot to check the box saying it was the final copy of your book), Amazon canceled your pre-order and you were banned from doing preorders for an entire year. Read more of this post