The Loving Dead — Amelia Beamer

Kate and Michael, twenty-something housemates working at the same Trader Joe's supermarket, are thoroughly screwed when people start turning into zombies at their house party in the Oakland hills. The zombie plague is a sexually transmitted disease, turning its victims into shambling, horny, voracious killers.

Thrust into extremes by the unfolding tragedy, Kate and Michael are forced to confront the decisions they've made, and their fears of commitment, while trying to stay alive. Michael convinces Kate to meet him in the one place in the Bay Area that's likely to be safe and secure from the zombie hordes: Alcatraz. But can they stay human long enough?