This short CYOA-style piece -- originally published as an 8-page gamebook PDF -- has you wake up in a dark and strangely deserted Bodleian Library in Oxford. You can take a variety of paths through said library, experiencing terrors of suggestion more than any actual horrors, in what is basically a cyclical structure.
The piece seems very dependent on prior knowledge of the Bodleian. Not so much to solve it (there is no solving involved), but to appreciate the places that are evoked, since the writing is heavy on naming specific parts of the building and letting that do the work. Perhaps this is more enjoyable if you know where you are and how things connect to each other. But my knowledge of the library is incredibly meagre (I once walked past it as a kid) and I didn't get much out of this piece.