Every Friday I turn the blog over to Dan Marsicano for his Retro Recommendation, giving you a chance to learn about underrated and overlooked gems from metal's past. In November, we are spotlighting New Wave Of British Heavy Metal (NWOBHM) bands. This week, the spotlight is on Raven. After more than 30 years they are still making music, but this week we go back to the beginning. Their 1981 debut Rock Until You Drop is this week's Retro Recommendation.