Karin took a moment to think. This was strange indeed. Was there really no common factor that any of these shared? No pattern? "So what you're saying is that we know absolutely nothing? And that we have no leads except for the book?" 
This was already frustrating to her. How were they supposed to find out anything if whatever disappeared didn't even have any sort of logic that they could follow? 
"Was there any order at all for how things vanished? And does the book say when they will vanish, or only that they did after?"