Ghost of a Memory by Stephanie Flint & Isaac Flint
"Neither shying away from the visceral horror of reshaping humans into machines nor descending into shock and gore for the sake of it, the Flints create a tale that will appeal both to fans of young adult dystopia and those seeking a more complex tale than youthful hero against decadent regime."
More thoughts: https://davidjhiggins.wordpress.com/2018/06/15/ghost-of-a-memory-by-stephanie-flint-isaac-flint/