I had no idea. Terrific stuff. As a rule, I'm an abstract guy myself, but those images of Baskin's do resonate with me. When I first glimpsed the Custer image on the original hardback "Son of" cover, I thought it striking. Not stunning, mind, but arresting. Made me pause, sit up and take note, which, in addition to communicating something about the content within, is what a book cover is supposed to do.
My uncle was a professional artist who, like Baskin, worked mainly in woodcuts, figurative stuff for the most part. His work is framed and hanging all over my condo, including a series of pieces he did for my John Brown book, but which the publisher, in its infinite wisdom, chose not to use for no reason that ever was adequately explained to me.
Unlike "we mortals," we novelists, who are mortals of a certain dubious subset, are also reduced to cobbling facts together, but then transcending them, sometimes in the name of storifying, sometimes in the name of we know not what.