While it's bad for Nanoha and Fate, i liked that the eay way out, as in, talking, doesn't work so far.
Why would the book care about what they say? Even if it has a heart and feelings, which is stupid to assume it in the first place. The tears where Hayate's according to the book, and words can not be sad by themself. "xy died" may be sad, if it's someone you liked, and it may be reason to rejoice if it's someone you didn't like - especially in the context of such a setting, where true evil defintively does exist. And the face wasn't particular sad besides the tears, and it may also still be influenced by Hayate.
To sum it up: The books master had a clearly defined wish, fulfilling this wish as fast and exact as possible is the sole purpose of the book as far as we know and should be the most logical way of making it's master happy anyways.