That's pretty cool I think a lot of Metallica's early stuff was lovecraft inspired/contained references. I've never really got into Metallica but I prefer the earlier albums like 'Ride the Lightning'
I see your avatar is Cthulu. I woke up to the song this morning, The Thing that Should Not Be by Metallica, playing in my head. It was not on my radio/alarm. Anyway I understand it is a song about Cthulu.