There are at least two artists/groups with the name Ninth Circle. A majority of the full tracks available for listening are from the second group mentioned. 1) Ninth Circle is a Norwegian metal band. The name Ninth Circle was inspired by the book Dantes Inferno where the author describes his journey through hell. Ninth Circle was what he named the deepest region of hell, where the fallen angel Lucifer guarded the path which led to heaven. Ninth Circle's music can best be described as a furious powertrip with crushing guitars