Fantastic news!! The update is now live for anyone who purchased The Legend of Nariko : The Mark of Silverfrost.
You can go to the Amazon website, log in, and then go to Manage Your Content and Devices and you should be able update the book there.
If you have trouble doing so, please feel free to contact me at RaphaelTheAuthor@Gmail.com and I will help you get the updated version. 🙂