Contemporary scientific view of an old bulgarian literature record from 9th century and its balcan context (Taseva, L. Rabus A., Petrov, I. P. (eds.) Constantine of Preslav’s Didactic Gospel and the South Slavonic Translations of Homiletic texts (9th – 13th c.): Philological and Interdisciplinary Perspectives. Sofia: Institute of Balkan Studies and Centre of Thracology, Bulgarian Academy of Sciences, 530 p.)