human
Subaru:  While I did bring the item that would be called the book of knowledge into the city, I am not the one currently in possession of it. And the cultists’ demand was a bolt out of the blue for me as well.
gpt
Otto:  “That’s a roundabout way of puttin’ it. What exactly do you mean?”
human
Anastasia:  Noticing Subaru’s troubled reaction and Otto’s studiously calm response, Anastasia cocked her head. “Allow me to explain.”
gpt
Otto:  Otto nodded. “I suspect that most of you are not aware of the book of knowledge. Put frankly, it is apparently the origin from which the Gospels that cultists possess are derived—those suspicious magic tomes that record the future of their owner. Its passages are also supposedly far more precise than the Gospels.”
human
Subaru:  “The origin of the Gospels? When put that way, it makes some sense that they would want it. It is a blasphemous comparison, but I suppose it is similar to the Dragon Tablet?”
gpt
Otto:  “Unfortunately, it’s a bit difficult for me to say, because the book of knowledge was largely burned by the time I obtained it and was little more than charred scraps.”
human
Otto:  “Charred scraps…”
gpt
Subaru:  Otto’s words also described the fate of the two tomes in Subaru’s memories. Beatrice’s book had been burned in the fire along with all the rest of the contents of the forbidden archive. Meanwhile, Roswaal’s book had been burned by Ram and lost in the Sanctuary. As he had told Anastasia before, both of the books had been burned to ash. Which meant that if Otto had picked up the charred remains of one, it was most likely to have been Roswaal’s copy.
human
Anastasia:  “Ah, I think I know what you were after, Otto. The restorer Darts, right?”
gpt
Otto:  “...There’s no hiding anything from you. Yes, that was it precisely.” Otto nodded in resignation at Anastasia’s quick thinking. And Julius and Reinhard both seemed to understand as well from that exchange.
human
Subaru:  “Wait up there. Don’t go leaving me behind as the only one not getting it. What’s this ‘restorer’ thing about?”
gpt
Anastasia:  “Exactly what it sounds like. A specialist in magic who restores items. Darts is particularly well-known for his skill when it comes to this craft. If it’s him, then he could even restore a book from its mere ashes.”
human
Subaru:  “From its ashes?! Wait, that’s actually possible? !”
gpt
Otto:  “On the strength of that reputation, I secretly requested the restoration of the book of knowledge. So unless he took it during the evacuation, the book is currently being kept in Darts’s workplace,” Otto said, revealing the location of one of the objects the cultists demanded.
human
Anastasia:  “…When did you have time to ask him to do a job like that, Otto?”
gpt
Otto:  “After the negotiations at the Muse Company collapsed and I parted ways with everyone yesterday. Darts is deeply curious about ancient and rare items, and he was quite enthusiastic about taking the job…” When he had heard the cultists’ demand during the broadcast, Otto had probably been thrown for a loop.