I plan to ask a similar question for each book, namely was there a particular scene in this book that made you think or hit you really hard?
With book 1, however, I would argue that which scene stands out is fairly straightforward:
Title
Elfangor gets eaten after we, the readers have been hanging out with the preteen gang while they’re goofing around for a few pages, and with his death it becomes instantly clear that this will not be a fun romp. Whatever happens from the point of Elfangor being devoured alive forward must reckon with this first horrific scene.
You?
Ooh yeah that is a devastating line.