On the occasion of 80 years from the birth and 50 years of performing activities of the great opera singer, NIkola Gyuzelev, the National Endowment Fund “13 Centuries Bulgaria” and “Nikola Gyuzelev” Foundation jointly issued the book “The Knight of the Opera”, dedicated to the Maestro. It is part of the Jubilee program in memory of the world Bulgarian bass and was presented on 28 November 2016 in the Literary Club “Pen”, National Palace of Culture.