These are very nice covers. Good job! I like the first one best, but the one in the middle will probably stand out more as a thumbnail. However, your name will likely be illegible at that size.
I agree with that. I'd go with the middle one if it's a thriller and the third one if it's sci-fiScarlett_R said:For me it comes down to this: One says thriller, one says sci fi. Two very distinctively different genre targets. Whichever way your book leans to most, go that way.