Xəzər Kitab is a virtual library program by "The Caspian Publishing House" that offers readers a collection of over 90 books, pamphlets, and magazines on various topics like beautiful virtues, moral values, academic, family, children's literature, novels, and more. The program is compatible with all Android phones and tablets and allows readers to download books in any format for easy reading.

Paid books can be downloaded and used on two different devices if purchased. With the same Google account, paid books can be read on only two different devices simultaneously. To switch devices, the "Remove Device" menu within the program should be used, which removes the device's data from the database. The program's search tags include media Caspian, messenger, sin, prayer, remembrance, and more.