Fixed the buy online links

Okay, yeah, I just noticed the other day, nearly 3 months after the fact, that my last big site overhaul broke something important. All the "buy online" links used to point, via an embarrassingly convoluted mechanism, to a page called "Buy". And then, in a fit of brilliance, I decided I didn't need that page anymore. Oops. So I've given the PHP some kicking around, and now the buy links point to Amazon once again. Also, I removed Brass and Steel, the short story, from the "In Print" page since it is no longer in print.

It's becoming abundantly obvious that I need to rethink the guts of how this website works. For 4 titles it takes entirely too much maintenance, and I'm getting tired of the theme.

-JRS