Sezgin Ismailov writes his books under the pseudonym SEZGIN, He mainly publishes his printed books in German , English and Turkish . After his military service , Ismailov began his entrepreneurial path by opening an aperitif cafe in 1990. In 1996, Ismailov and a partner established a real estate agency. In 2007, with the same partner, they established a construction company. In 2016 Ismailov moved to Germany with his wife and children. He left the business to be run by his partner. In 2019, Ismailov wrote his first book, Manners in the Great Kingdom, and a year later his second book, The Wealth in the Great Kingdom. In 2022, Ismailov's third book, The Heir of the Dynasty, was written. In December 2023 he completes his fourth book "369 hours punishment". He is currently working on his fifth book for children over 12, 'Unforgettable Personalities of History'. He is also keen on reading books and buying dividend stocks. He is a gold author in the self-improvement category. At the Golden Pencil Awards 2023 Turkiye