Built Upon Frustration- Book Of Mourning CD. Built Upon Frustration combine the elements of the music they love, mainly Metal and Hardcore. This metallic Hardcore beatdown band from Pittsburgh quickly found themselves among the top of Pittsburgh's Hardcore scene. Their debut album ‘Book Of Mourning ’ delivers everything you’d expect from a band that includes Eric Klinger from Pro-Pain / the Spudmonsters and Derek Kovacs from No Retreat. This album is a ten song bruiser for fans of Hatebreed, Sick Of It All, Madball, One Life Crew and Agnostic Front. This album is getting harder to find. One per order on these.