SOLVED. Looking for sci-fi cinderella book, i found on goodread a month ago. not cinder. HELP! [s]

[Anita]

i saw the book title about a month ago, but wasn't using my own computer, and forgot to mark it as want-to-read. Its a YA sic-fi romance about a cyborg, done in a cinderella reimaginating way, * I THINK it has metal somewhere in the title, comes out in 2015, and has a gorgeous multicolored cover of a girl (no features, just a black blank canvas girl sized shape) standing on a bridge. cover has green and bluish, maybe purple background. it is not cinder, or ash. PLEASE HELP!
thank you! :)

[Holly]

Mechanica?

If not, maybe you want to check out this list: https://www.goodreads.com/list/show/1...

[Anita]

yes! Thanks so much.