K-Library is a .klib reader. In Kaldus, the National Library will have access to thousands of books with using the .klib, or ePub format. These files can also be used with ebook tablets to allow a person to markup notes on the file (assuming they own the file). The K-Library app will handle all of that.
To make the best use of the K-Library app, one would want to acquire an Kaldan Library account. This will require a GIN, and NIN to log into the government portal to add an account with the Kaldan National Library.