Wake up

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"For John, a potato isn't just a staple food, it's wondrous, the secret of his success and key to the future. With his brother, Greg, he has turned their father's greengrocery business into Spudnik, Britain's largest dealer in potatoes. Now he wants to change the world by introducing, through potatoes, edible vaccines; plants genetically modified to provide an edible alternative to injections."--J...