Oops. I assume it's too late to fix since the book has already been available in print for a bit now, but was re-reading Volume 11 and noticed a continuity error.
Halfway through Volume 11, Chapter 3, the family starts talking about an increase in parts of the animal population, and speculating that it's because they killed two bears. Diana later comments, "I've only seen one once."
In the novels, Forge Eizo has actually killed three bears. Eizo soloed the first bear in Volume 1. They killed a second bear in Volume 4 when a bear invaded Jolanda's home (Diana actually dealt the killing blow on that one). And the third bear in Volume 5 was how they got Lucy.
It's probably a discontinuity from the original web version of the story, since I believe Jolanda was a new character introduced for the novelization. I assume in the web version there were only two bears, and they forgot to correct the count in the Volume 11 reflections.