Heavy metal, rusty metal, black metal.
Here is more elements to the 'skeleton.' The piece was destroyed in a flood.
This took so much effort to create, and maybe one day I will recreate it. It was in response to the events at Tiananmen Square. I used to collect rusty metal. It becomes very tactile when Hammerite or some other metallic or glassy paint is added. The book was slowly and carefully obliterated with ink and varnish.