: New users can typically get the audiobook for free by signing up for a 30-day Audible trial , which includes one credit valid for any title in their library.

But with a warning.

Finding ways to listen to The Sword of Kaigen for free involves using legitimate trial offers and occasional promotional codes from the author. While the book is a popular self-published military fantasy, it is not in the public domain, so you will not find it on sites like Top Ways to Listen for Free Audible Free Trial