Yaroslav Kostyuk was Born on October 2nd, 1955 in Magadan. He graduated the Leningrad Military Mechanical Institute in mechanical engineering; worked as an engineer and an investigator of space engineering. Now he is a housekeeper. He lives in Moscow.
His personal library includes approximately 6,000 books, including 3,800 miniature (no bigger than 100 mm) and micro (up to 10 mm) books.
His main focus of research is the history of micro and miniature books in Russia and abroad, the history of miniature book fan clubs and communities.
He is an author of over 80 articles published in both the Russian press (Book View, Exlibris NG, Polygraphic worker and Publisher, Bibliophile, Russian Bibliophiles, Almanac of A Bibliophile, Bibliophile News, Counter Play News of Cosmonautics, Russian Space etc.) and in specialized international magazines (the United Kingdom, Germany, the USA, Poland and Taiwan).
He is a member of book exhibitions in Russia and abroad (15 countries) with the individual expositions of miniature books and a personal bookmark . He delivers lectures in cultural institutions (libraries, museums) and also in educational institutions (schools, technical schools, colleges and universities) in order to promote books, book art and Russian culture. He is a participant of The Miniature Book Society, international congresses of miniature books collectors held in Germany, the USA, the United Kingdom and Ireland.
He took part in the production of 7 miniature books as an author, composer and editor.
His library features 4 bookplates (the artists are: A. Kalashnikov, N. Kalita, G. Grak and S. Kulmeshkenov).