NOTE -
At this point in time I feel that Winpub is stable and all that I'd originally envisioned in a Windows-based e-reader has been achieved.
If anyone is actually using this, and finds errors, or that Winpub lacks features, please let me know. I'd be happy to investigate and pursue development further.
Otherwise, I don't see much more forthcoming.
I thank the two people who've commented: @Gormagon and @Sarmat89.
https://airshares.net/
https://airshares.net/winpub/index.html