Öz İbrahim Tellioğlu, who is a professor at Ondokuz Mayıs University, Faculty of Letters, History Department, displays his knowledge and talent to address a highly debated issue: Trebizond Greek State from a perspective unlike the common Western historiography in that he discusses it introducing several sources such as the Chronicle of Michael Paneretos the major source of the period of III. Aleksios (1349-1390), the most important source, regarding the relations of the Comnenos dynasty with the Turks and Venetians and Geneose in the neighbourhood, the Byzantine sources such as the the Chronicle of Georgios Acropolites, which enlightens the struggle of David Comneos with Theodore Laskaris, the Chronicle of Nikephoras Gregoras, Ioannes Kantakouzenus, and Laonikas Chalkokondyles and the Chronicles of Papadopoulos regarding Trebizond included at the end of the works ofJ. P. Falmerayer, G. Finlay, W. Miller, S. I. Karpov and F. I. Uspenski. Besides, he introduces the Venetian and Geneose sources related to the political situation of the Black Sea region and the Comnenos, especially from the last quarter of the 13th century onwards (p.xııı-xvı).