It’s double-down time, the 50,000-word stage in the book where I feel as if I’m on my knees pushing a cheese puff along the Camino de Santiago. I’ve erased Solitaire from my cell phone. My Oxford American Writer’s Thesaurus is a barbed-wire thicket. I open the refrigerator to pull out yesterday’s cooling scene and all I see is limp cilantro and velveeta.