I came across this in a Half Price Books store, and was either unaware it existed or had forgotten about it.
Crowley, John. Great Work of Time. Bantam, 1991. First edition paperback original thus and first separate edition, original publish as one of four novellas in Novelty two years before, a Fine- copy with edgewear. His World Fantasy Award-winning time travel novel, it which an initial time travel effort to keep the British Empire intact eventually results in radical changes up the line. Bought from Half Price Books for $1.79.
I think Bantam may have been the only mainstream SF publisher of the late 1980s and early 1990s who would put out novellas in paperback form, as I know they did a few others.
Note that I still have copies of the signed, limited hardback edition available through Lame Excuse Books.
Tags: Books, Fantasy, Half Price Books, John Crowley, Science Fiction, Time Travel, World Fantasy Award