First We Kill All the Zombies — Connie Flynn

So Many Twists and Turns it's Like a Thrill Ride. A couple's long delayed honeymoon is interrupted when they get shanghaied to Nineteen-Twenties America where a diabolical team is fabricating zombie soldiers. She is a brilliant biophysicist, he a former Green Beret, and they have no intention of fulfilling their kidnappers' plans for them. They have plans of their own that include averting the zombie apocalypse and returning to their own time. Then things really get complicated . . .