I like the text for Nightscapes and Dreadsongs best on the second one (with the slightly smaller and and offset capitals; I'm a big fan of slight amounts of asymmetry), and I think you've got that bit of typography nailed down. You can add a glow to it if you want, the bright blue is nice and high contrast. I like the author/series positioning best on the first one. I don't think the red motifs match the mysterious green backdrop and blue text, but otherwise, this is pretty close, it looks a lot better now!
Regarding the color choice:
You seem to be set on the green background, which I like. The reason when I did my mockup I used purple is because it's the complementary color. If the main color were that blue in the letters, if you were to do a direct complementary color, you'd pick red, and that would look all right. But, because you're going with blue letters, if you want to pick a triangulated color scheme you'd want to pick a more royal blue. Now we're getting right into color theory, and that might be complex to understand without visuals, so let me just show you...
Triad colors with green, blue, and an orangy-red.
So if you were going to stick to wanting green, blue, and red on your cover this is kind of how I would go about it.
Now, some people are going to say you can't do blue and green together. I disagree. But if I did, I would probably stick with this kind of range.
Moacolor.
And the reason I went with the initial color was of course, this split complementary.
So classic. So of course if you go split complementary, that blue and red is fine, but then you want to ease up on the green.
I think you're 95% there on the type, you can totally do that blue and green. Maybe fiddle with the color scheme for the corner buttons. Good work though!