The first version of broken is so lovely! It’s simple, and yet the colour combination and layout of the text absolute has my heart XD.
The second version doesn’t give me as much of an angsty vibe so yeah … also, this is a general rule of thumb but never use script fonts for subtitles/author names etc.
Fated Desires has a really lovely layout, but I do think you could have given more focus to the lighting. So, the wolf will be backlit, and the girl frontlit. You could up the contrast, increase the moon’s glow and darken everything else before using curves for the highlights on the girl’s hair, the upperparts of her arms falling inwards (if that makes sense) and on the wolf’s fur.
As for When Our Stars Collide, once again, nice layout. Some lighting and depth work here could really pull things together. That swirling thing in the sky (which could be centered imo) can be casting blue light onto the tops of the manor and on the grass. Since the light’s coming from the back towards the top, the manor should be casting a shadow onto the grass.
You’ve got a lovely colour scheme for the first version, and I think here you could have really made gradient text pop. As for the girl, she should have just a touch of light from that backglow on the inside of her, if that makes sense. I think the gray suface at the bottom of the cover is a little out of place, so maybe darken that to be more towards black, and that also would make those purple swirls pop more?
The second version also really cool colour scheme, but the top part is kinda unbalance imo. There’s too much of an overlay kinda darkness there, so maybe you could either remove it for a gradient or stretch it out so it spans both top and bottom evenly? Nice text effect, but I think Shadow should have that yellow glow and Glowing can have the blue at the top, so you’ve got an alternative effect. Shadow kinda looks empty rn in comparision with glowing. And I think you can move the subtitle to be at the top.