What bothers me about the cover is that it's almost a great idea, but fumbles. A creepy/weird cover is completely appropriate for Dahl's weird & creepy books, so some iconic scene from the book photographed like this would be great: Violet becoming a blueberry, Willy Wonka being crazy, Veruca grabbing a squirrel, etc. But when even folks who've read the book a thousand times have no idea what this is supposed to portray, it's not working.
I'd love to see a Lynchian photo like this of a kid hanging out with insects, a boy being turned into a mouse, or a kid brewing up marvelous medicine. The style is great.