Thanks to an inadvertent tip from @HubCityQuestion, I’ve added a new list to the project:
Digitized Comics Unavailable on DCUI - eBooks
These are a handful of titles released exclusively on eBook platforms, such as Amazon Kindle and Barnes & Noble NOOK, between 2011-2013. Before HCQ mentioned the Day of Judgment Kindle book in that post, I had no idea titles like this existed. I’ve included both Vertigo and DC titles on this list.
It’s very possible that I’ve missed some of these. Despite being a multi-billion dollar company, Amazon’s search and filtering options are atrocious and hard to use. And I checked 2010 and 2014 and didn’t see any titles like these, so I assume that none exist outside of the 2011-2013 time period. But I could be wrong. So if you’re aware of any titles that are missing from this list, please let me know and I’ll add them.