Vegan Zombie Apocalypse is a novel written by Wol-vriey. It was first publihsed in 2013.
In the post-apocalypse worlderness, zombies rule the earth. They're allergic to meat, and brains literally make them explode.
Zombies now eat blood potatoes, parasitic tubers grown in the flesh of humancows corralled in maximum security farms.
The necros, barbaric human nomads travelling the worlderness in floating villages, worship the zombies. The necros both eat the zombies, and wear clothes made from them; they live in houses built of bricks of undead flesh. They also keep zombies as sex slaves.
Two fugitives meet in the ancient ruins of Texas. The first is Soil 15-f, a womancow who's escaped her farm a week before she's due to be killed and her blood potato crop harvested. The second fugitive is Able Kane, former head necros food technician, now sentenced to death for heresy.
But Soil is no ordinary humancow. Unknown to herself, she's the vegan zombie agricultural revolution, and the zombies desperately want her back.
And the necros equally desperately want Able Kane dead. He's fled with a forbidden discovery which will reshape the world for the worse if used. And Able is just hardheaded/misguided enough to use it.
With android zombinators and the head necros assassin (Able's ex-girlfriend Morphia) after them, Soil and Able Kane have no choice but to climb the lemon tree to Haeven, residence of the zombie god Necro.
And by anyone's reckoning, Soil and Able Kane are the two people in the worlderness who should never have been let into Haeven.