It turns out that they're done by Jeffrey Thompson, of Baltimore. For many years, Jeff was the Wednesday staff at Big Planet Comics Bethesda and I've followed his illustration career for years. It was a good feeling to see these illustrations in a brand new book. I didn't photograph them all, but the Tarot Card concept is integral to the plot.
I enjoyed the book quite a bit, and I've seen it compared online to American Gods which seems reasonable. I'd recommend it.