Jaded Touch (Vesper #2) by Nola Sarina
Synopsis: Three is tormented by the branding scars on her back, broken memories of her fallen creator, and the looming consequences of her secret friendship with Sychar – a male of her kind – a high crime in her world of serpentine guardians. Then along comes Jack – the human train engineer she saves in an explosion. His touch weakens both her knees and her sense of duty. Now Three…