The concept of Bulgarian book (Balgarska Kniga) is inclusive of manuscripts and printed and digital books written and reproduced in Old Bulgarian, Middle Bulgarian, and Modern Bulgarian in the period from the 9th to the 21st centuries. Along with language, due to a number of historical circumstances related to political, cultural, and economic factors, categories of Bulgarian books also comprise literary products created in foreign languages by Bulgarians with a clear Bulgarian national consciousness. Because of the long period of existence of the Bulgarian state (681–2021) and its two periods of political dependence—the Byzantine rule (1018–1185) and the Ottoman rule (1396–1878)—historical boundaries regarding the creation, distribution, and influence of the Bulgarian book far exceed the political borders of the modern Bulgarian state. The cultural influence of the Bulgarian manuscript book can be attributed to Bulgarian rulers and high clergy who were the first to successfully apply, develop, and disseminate Glagolitic and Cyrillic written systems, thus helping to build an independent Slavic Christian culture in the Balkans and Eastern Europe. This influence accounts for the Bulgarian book’s wide distribution as early as the Middle Ages and explains its 21st-century presence in a number of foreign libraries and museums. As a material object and a cultural phenomenon, the Bulgarian book can be studied in five main periods: the manuscript book (9th–19th century); the printed book in the period of the Ottoman Empire (1508–1878); the printed book in the period from the Liberation of Bulgaria to the imposition of the socialist centralized planned model of book publishing (1878–1948); the printed book during the socialist period (1944–1989); and the book in the postsocialist period (1989–2021).
