Recently, while aimlessly surfing the internet, I came across a graphic artist's website who has done some really great sketches of Batman that I knew my readers would love to see. They're done by Raffaele Marinetti. Shown up above are 2 examples. It appears that he lives in Italy but his site is in English. Here's a link if you wanna check out more of his work.
http://www.raffaelemarinetti.it/
