recenty I read the book Sound Of The Beast:The Complete Headbanging History Of Heavy Metal.it's
actually a pretty good book.just about everyone who
has even picked up an overdriven guitar in the past 20 years is mentioned,as well as thing's like tony iommi's story of the severed finger's,Tipper Gore's
anti-obscenity rampage,and yes even the early 90's
norwegian infamy,such as the church burning and
the ill-fated mayhem member's Dead and Euronymous.pretty twisted fuckin' country if you ask me,but anyway,the book also contain's intricate diagram's like the deciphering of the genre's and metal's earliest-to-latest roots.