From IF Classics (http://ifclassics.weebly.com/):
"The Gift of the Magi" by O. Henry
"The Ugly Duckling" by Hans Christian Andersen
We are currently working on “The Hammer of God” by Gilbert Keith Chesterton, which should be available within a week.
Two possible download formats (in .zip files):
Our interactive classics always contain the complete public-domain text.
My reaction was “Huh?” and it still is, so I went to look…
The notes file says:
I didn’t try running the thing, but it doesn’t sound like a sophisticated conversion.
The conversion does more than turn pages for you. Moreover, the source code is available so interactive fiction programmers can make any desired changes.