Delving further in to Goblin Slayer's past, this volume chronicles an encounter he has with Arch Mage, that leads him to discover something quite out of this world.
This was actually quite a confusing book, where the real plot never really gets going until almost halfway in. It does have vignettes of other familiar characters in the original series to tide things over, but I'd say there is a surprising lack of focus overall.
It would've been a good entry if it focused on some character development, but the one that got the most screentime here is surprisingly Cow Girl, albeit in a rather boring fashion of getting one-sidedly jealous when she sees our hero interact with his female compatriots.
While the first volume gave interesting insights in to the beginning of our hero's career, this one feels rather pointless and tepid at parts. An easy skip if you're not that invested in to his backstory.