I came across some video montages of Robert McGinnis' book cover art on YouTube. There's a promo for a McGinnis documentary DVD, which I never knew about and must try to find:
And this montage, Girls, Guns, and Death, includes McGinnis' cover of I, Lucifer.
McGinnis is also featured in this CBS Sunday morning clip, which discusses Stephen King's first 'pulp fiction' novel 'The Colorado Kid' (2005). It is published by Hard Case Crime, a publishing house that aims to bringing back the pulp noir paperback. McGinnis was commissioned to do a number of covers for them, his first book cover work in some years. You can view all the covers on the Hard Case Crime website.