[jhowell]

from Notifying Customers of Book Updates at Amaon:

We'll review the book within seven days, and may take one of the following actions:

• Corrections to distracting errors. If we find only minor corrections, we won't notify customers who already own a copy by email, but we'll activate their ability to update the content through the "Manage Your Content and Devices" page on Amazon.com.
  
• Corrections to destructive or critical errors. If we find major corrections, we will alert all customers who own the book via email. These customers can choose to receive the update through their "Manage Your Content and Devices" page on Amazon.com.
  
• Additional corrections to critical errors needed. If we find more major corrections are needed, we will temporarily remove your book from sale. We’ll notify you of the issues we found so that you can fix them. Once the improvements are made, just let us know and we’ll email customers just as with major corrections.
  Please review our Guide to Kindle Content Quality for information on the most common types of quality issues. Make sure to provide detailed examples of the corrections made when submitting your request.

Some examples of corrections that don't justify sending updates to customers who previously purchased your book are:

• New Content Added: Chapter(s) or page(s) added, deleted or revised; new images added; bonus chapter added.
• Book Plot or Character Changes: Character's name changed; book ending changed.
• Marketing Information: Links or marketing info added, deleted, or modified.