Authors can update their books anytime, even after publishing. Here’s how:
Edits generally go live a couple days after publishing the update. Amazon, iBooks, Barnes & Noble, Kobo, Google Play, and Bibliotheca process changes in 1-3 days. OverDrive processes changes in 7-10 days.
Publishing changes to your book’s content does not create a new edition or impact availability in any way – the version currently live on retailers will update seamlessly.