Book cover layouts

Ok, so based on where I;m at, here are a few possible layouts for back covers, I like how understated they are, simplistic like the covers seem to be shaping up to be. Again, I've used a range of fonts, Times being my least favourite and me being tied between Helvetica Neue, Clarendon and Gill Sans for what works the most. I think I'm going to try a bit more diverse a range of layouts, but I really like the way it forms a small tidy block of justified type. Let's see what the people who know more about the type say.

Open publication - Free publishing - More penguin