Ward by wildbow. Not technically a book but it's wonderful if you are into that genre and honestly probably still good if you aren't. Finished worm and while back and would definitely recommend that as well

To give a brief idea it's "what if super powers came from incredible trauma and were designed to be the worst possible power for them specifically" there's a lot more to it like A LOT but that is a general idea. It follows Taylor and her journey after gaining power. It's essentially her struggle to be in control of everything that goes on around her