Surviving the Apocalypse: Long Leggity Beasties is up on the JMS site, and it's 20% off!
This is the third book in the Apocalypse series, and while they all take place in the same town of Laurel Hill, each one deals with a different cause for the apocalypse, all due to mankind.
The first two are m/m, but the last is f/f.
I'm hoping I'll be able to offer all three in a paperback anthology down the road. :-)