Japanese three CD pressing of the Industrial band's 2008 release features a bonus CD that contains commentary on the album by band leader Trent Reznor. Ghosts I - IV is a 36 track instrumental collection, almost two hours of music composed and recorded over an intense ten week period in the fall of 2007. Ghosts I - IV sprawls Nine Inch Nails across a variety of new musical terrains. Hostess.