The books from our Golden Age in the cultural heritage of Varna, their preserved titles in the Russian chronicles, outlook and content

The text that follows shows that with the work and diligence of many Russian scientists of the XIX century, such as M. Bobrovsky, Prince M. Obolensky and many others, it becomes clear where, in the X and XI centuries, in Kievan Rus were the first books from Bulgaria that laid the foundations of Russian writing. The text shows the appearance, names and content of three samples of them: "Book of the First Genesis", X century; the oldest text of "For the letters" by Chernorizets Hrabar; and finally - "Suprasalsky manuscript", because it is the first at the time of discovery and proof that it is of Bulgarian origin