Fair warning to all: the watermark on the epub purchased from the publisher is pretty obnoxious. On Apple Books it floats over every page and in some cases covers actual text.
I’m sure this is software related, and I’m on the iPadOS 16 beta, so it may be less of an issue for others. On my phone it folds into the header and truncates, but on the iPad it is super obnoxious.
I hope they fix this though. I’m submitting feedback.