"Oh," she said again, hearing the note of uncertainty in her voice, and so did he, damn him. She saw it on his face. Hermione was not an avid fan of science fiction, but if she had nothing else on hand she would read Heinlein, and enjoy it well enough. "Not a bad book, altogether – I've read it once or twice," she added unnecessarily, striving hard for civility. She would give him a chance to show exactly how it was that he'd changed for the better, if indeed he truly had.