[nrubenstein]

It seems like this is surprisingly rare (not in Gerty or Kindle) and/or implemented very poorly (for example, Marvin, which buries it in a menu, which is not conducive to browsing).

So far, the only really usable reader that I've found is ShuBook.

Is there anything else that I should be looking at?
Marvin, Gerty, and a number of others just don't seem to offer this.

After seven years, Tomes/Bookshelf appears to finally have disappeared entirely from the App Store after getting abandoned long before then, so I've been forced to actually do something. It's no longer even available for re-download. Historically, I've periodically looked around, bought a few apps and then decided that it wasn't worth the effort to modernize the parts of my library that don't have any metadata.

And if there is anything that can do an actual browse by folders and retain an existing directory tree (the killer feature of Tomes), I would *love* to know...