I agree with preferring the second one, and also with filling in the eyes with white as you do on the first one.
Ditto what Paul said -- my brain has a lot of trouble with the title. I assume the top and bottom line go together as the book title, and the middle line is the series name? It just jumbles up very quickly for me and I had to make a lot of mental effort to read it even at full size. I think either differentiating the two fonts just a bit more, or separating them more (one above the other, or somesuch) might help. With 'Trinity Nexus', it also might help to reduce the kerning between the letters of each word, so the two words are more distinct. My brain mashed it all into one word.
Nitpicky stuff, though. These are really neat.