My main problem was the fact that the US cover didn't show that this was a series full of action. It looks more like a romance book when that's far from the point of the series albeit it's an element. But look at the UK cover! Now that's a cover that's fully representative of the series I love. The silks are there, but so is the fighting pose, the knife, the "I'm gonna cut you" look. Perfect.
The crazy thing is that there's really very little difference in the two, but that makes all the difference.
Here's the US cover for comparison: