Iron Maiden’s monumental. The Book of Souls. Double album was released on September 4, 2015. As the band’s longest record, clocking in at an epic 92 minutes and 11 seconds it also boasts Maiden’s lengthiest song to date, the sprawling 18-minute masterpiece. Empire of the Clouds. On the cover, the Iron Maiden mascot, Eddie, is depicted as a Mayan warrior by artist Mark Wilkinson. As a tribute to the most epic of all Maiden music, this two ounce 99.9% pure silver coin features Eddie as he appears on the album artwork. That is, except he is in exceptional high relief and high detail! Limited to just 999 issued worldwide. Minimum Gross Weight (g).