I heart them all and happen to own a few myself. The intricacy and detail of Yellena's prints which she draws using pens, inks and markers is incredible. These make for an interesting and colorful addition to any wall.
Etsy featured a Q&A with Yellena in 2007 which you can read here. I love this photo of her workspace. That painted canvas behind her desk looks like the perfect vision from which to draw frenzied creative inspiration. I wonder if it's her own work.