Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. David Sardy (more commonly known as D. Sardy) is a Brooklyn born-and-raised composer, musician, songwriter, and record producer. In the late 1980s and early 1990s, Sardy was active as a singer, songwriter and guitarist (most notably with his group Barkmarket), but since the mid-1990s, he has been more active as a producer, writer, composer and mixer. He has worked with an eclectic mix of rock, punk, alternative, electronic and industrial rock performers, and critics have called him a "Hardcore super-producer."