Sezgin Ismailov writes his books under the pseudonym SEZGIN. He publishes mainly printed books in German, English, and Turkish. After his military service, Ismailov began his entrepreneurial path, opening a café in 1990. In 1996, Ismailov and a partner established a real estate agency. In 2007, together with the same partner, they founded a construction company. In 2016, Ismailov moved to Germany with his wife and children. He left his partner to run the business. In 2019, Ismailov wrote his first book, "Manners in the Great Kingdom," and a year later his second book, "The Wealth of the Great Kingdom.". In 2022, Ismailov's third book, "The Heir of the Dynasty," was written. In November 2023, he completed his fourth book, "369 Hours of Punishment.". He is currently writing his fifth book, "Unforgettable personalities of history.". He also enjoys reading books and buying dividend stocks. He is a gold author in the self-improvement category. At the Golden Pencil Awards 2023, Turkey