World Enough and Time — J.M. Snyder

The world is coming to an end. Allan is pretty sure that's the only explanation for the rain of salt that's been falling for days, killing people in the streets with its insidious power, spoiling the earth, and bringing Armageddon on a bit sooner than everyone expected. Knowing he'll probably die empowers Allan to quit his job, break up with his cheating boyfriend, and even put his fear aside when he meets Ricky, a mysterious man with a gun. They connect in a way that makes him sad that the end of the world is so imminent. A few lusty moments seem to be all they manage to steal ... until the morning.