You can change the types of notifications you receive in the Notification Settings section of your Account Settings.
Edit notifications
Navigate to your My Books page.
Hover over your avatar at the top right, and click Account Settings.
Scroll to Notification Settings.
Uncheck the box next to the update you'd like to turn off.
Click Update Preferences to save your changes.
Opt out of all notifications
Navigate to your My Books page.
Hover over your avatar at the top right, and click Account Settings.
Scroll to Notification Settings.
Click Opt-out of notifications to instantly opt-out of all emails, then click Change notification preferences to return to your Account Settings.