For Northern Irish author Eoghan Walls, great writing can start in the most ordinary of places. “I think that is where literature really happens, in our kitchens, in our bedrooms, in the spaces where we take off our masks and our uniforms,” Walls said. In his latest novel, “Field Notes From an Extinction,” Walls explores fatherhood, privilege, and the reckoning of a people amid starvation. Walls will make his book tour debut in the United States at the end of…