Here’s why sideloaded books might not be working on your Kindle

What’s new: A recent bug is preventing Kindle owners from opening new sideloaded books, displaying an “Invalid ASIN” error message. Amazon has acknowledged the issue and is working on a fix.

Who’s affected

Kindle users who have recently attempted to open unread sideloaded titles are experiencing this issue. Books that have been opened previously are not affected.

What to do

  • Use the three dot menu to navigate to the book and select a chapter to access it.
  • Toggling Airplane Mode may help avoid redirect loops to the Kindle Store.

Sources