The life of the founding father of the Republic of Turkiye, Mustafa Kemal Atatürk, in Bulgaria is presented in a new book by Nahide Deniz, the long-serving BTA correspondent in the country. The publication, titled 440 Days. Atatürk in Bulgaria, explores his stay between 1913 and 1915, when the future President of the Republic of Türkiye was appointed the first military attaché of the Ottoman Empire, the publishers from Bulgarian History said on Friday.