Please note that the content of this book mainly consists of articles that are available online from Wikipedia or other free sources. Harun Yahya, whose real name is Adnan Oktar, is a Turkish writer, publicist, and one of the most well-known creationists in the Islamic world. At least until October 2000, he denied the Holocaust. Harun Yahya is the author of numerous creationist books, films, and websites. Adnan Oktar studied interior design but did not complete his studies. He began his career by preaching to young members of the upper class in Istanbul. In 1988, Oktar attracted the ire of Islamic conservative circles when he instructed his female followers to remove their headscarves. Furthermore, he reduced the number of daily obligatory prayers from five to three, among other things. In 2008, Oktar was convicted of forming a criminal organization.