Bruce Sterling and Lewis Shiner. Mozart in Mirrorshades.
A story which could appear quite happily in an issue of Asimovs in 2003. An earlyish take on the concept of time travel taking us back to quantum variations of Earth history, as opposed to our own history. And we see the full horrors of what would happen as the protagonist beds Marie Antionette and turns Mozart into a much more hip dude who has no reason to work hard to create his masterworks, as they already exist.
Conclusion.
A cracking little paperback, which every self-respecting SF reader should have at home. The pbk version I have also features a neat reflective pair of shades (which my scanner totally fails to scan!). ;-)
review copyright Mark Watson 28th September 2003