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John, first I’m not able to open the 661 epub in iBooks on my Mac. So, this is surely not good.
Second, if I crack up your file with BBedit and search for a link, I found something like:

<p class="Basic-Paragraph ParaOverride-1"><span id="_idTextSpan360" class="Hyperlink CharOverride-6" style="position:absolute;top:0px;left:0px;">https://www.campdubois.com/?</span></p>
</div>

But it should be something like:

 https://www.campdubois.com 

That means: You have no real hyperlinks!