I almost forgot how good Mike Perry is at hand-drawn awesomeness. These are a few of his “greener” works, but he’s got a lot more going on than this. I think that Bard Observer is a great example of making a two-color design really interesting. There’s a ton of amazing work up on his site, so take some time to dig through it. And if you’re into this kind of stuff, you should pick up a copy of his book, Hand Job, which is filled with it.