I'm doing just the first one.
I feel like I'm not the target audience, but I'll do my best.
The cover looks pretty cool, my first thought about "Purple Shades of Blood" was that the story might involve royalty or nobility, as purple is usually associated with those groups.
The description didn't give any evidence to my theory and I felt like it was a bit vague. The only hook I see is finding out why is there Purple Blood. (Unless the one bleeding is a diehard Prince fan)
I'm more on the "wordier" side of the writing spectrum, but I like your writing style, is easy to follow.