From The Art of Michael Whelan:
"Patricia A. McKillip is a terrific writer, very inspiring. My cover concepts for her novel The Changeling Sea, taken together, were some of the best I'd done up to that point. Chosing among them was extremely difficult. When the editors asked, 'Well, which one do you prefer?' I didn't know what to say. I liked them all. Then I pointed out that other things being equal, the one with the largest face would probably be the most attractive on the bookstands, so that decided the issue."