[Cactus Chef]

So here's a question that's been bubbling in my head for awhile now, because I could swear that I can switch from book to book and have the same main font, supplemental font, and font size set identically, yet on some books I've gotta bump up the font size considerably to get it readable. I happened to run into a prime example today, and so I thought I'd capture some photos and pose the question to the cadre of Kobo experts.

I've attached several screenshots (apologies for the glare, the only place with enough light was a bathroom). The first two are from the novela "The Word for World is Forest" by Ursula Le Guin out of the Again, Dangerous Visionsb anthology. The second pair of screenshots are the same text (same paragraph, as best I could get it) out of the standalone novel, The Word for World is Forest. You can see from the screenshots that the settings on both books are identical.

So my question is: why is the font so much smaller on the standalone version?

I assume it's gotta be some backend coding in the EPUB that is making it behave this way, but then why even have the font controls on the Kobo settings if it doesn't actually control the font in a consistent manner?