Okay the UK cover is on the left and the US cover is on the right.
Take a moment to appreciate the true awfulness of the UK cover. This is possibly the worst UK cover ever. I've wiped the Kim Harrison UK covers from my memory so this might be wrong.
The UK publisher has somehow succeeded in making John Matthew look like a demented slightly pudgy green troll. Whoever approved this cover a) needs to get their eyes tested b) seriously needs to reconsider their career choice.
I would gladly take the generic blandness of the US cover - naked male torso, yawn - at least it's aesthetically pleasing. Or even better just the title and author in a lovely gothic font. Because it couldn't possibly be worse than the horror up there on the left.
Of course there's always the possibility that the internet doesn't do the real cover justice. But there is no way I am having that thing on my book shelves.