Black Sabbath
Sabotage

For me, this is the must have album from the excellent Black Sabbath Catalogue...Commercially the least sucessful the BIG 6 first albums , however still a monster seller worldwide.Its opening track Hole in the Sky is a stonker and it also contains arguably one of the greatest HM tracks ever let alone Sabbaths best, the draw dropping Symptom of the Universe, which to me defines the term Heavy Metal to a tee, and has everything.