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Just to follow up on my own inquiry: I downloaded nearly every popular ebook reader in the Google Play store. Most, like the big ones like Kindle Reader did not even open the book. The one I am using daily now is Lithium, which opens and renders the books correctly, but you cannot zoom.
A second option is the eBook reader included with the legacy versions of MIXplorer. This was does let you zoom, but it does not show the table of contents, so it was less convenient for me. Current versions don't work so you need to find an archived APK.
I probably tried the top 10 Android eBook readers and all the others were worthless.