Black Sabbath is often credited with inventing heavy metal when they released their first album in 1970. Their new style of music was loud, brutal, scary, innovative, and highly influential on heavy metal bands from then on. Their five decades of music crosses generations of fans, and they remain relevant to this day, with their 2013 album charting #1 in the U.S. and in at least five other countries. In Experiencing Black Sabbath: A Listener's Companion, musician and scholar Nolan Stolz leads the reader through Sabbath's 20 studio albums and additional songs, offering a close look into their...