Artbook possibility?

I want to start by saying I love this game and have been having a blast with it.  Thanks so much for all your hard work and dedication, especially in the face of a rocky start.

I gotta say, I love the designs in the game.  The characters, the environments, the effects... They're all top notch, and I can't get enough hehehe.  I was wondering if there might be an artbook available, or perhaps, in the works?  Or maybe something along the lines of a downloadable art book?  Concept sketches, character designs, etc...  I'd love to see how all of this came together..

Maybe it's just a silly idea, but I've been collecting artwork and designs from games for over 15 years, and I would love to get my hands on more of what I see here.  Again, top notch, and I thank you for all  you've done with the game.