My grandmother, known in some circles as “Momma,” called from her cell phone at nine o’clock one Saturday night in late October, 2011. An eerie snow was falling. I was basking in the lazy glow of a House Hunters International marathon and screw-top Pinot Grigio, surfing Craigslist sublets in exotic cities far from our Connecticut farm. “How you doin’, kid?” she asked. “Pretty good,” I said. My parents were out of town. The dogs were…