I wonder if I chose only one moment to go back to, which one it would be? It might be the day Nana took me to the beach. — The summer before her ninety-seventh birthday, my grandmother, Nana, passed away in her sleep. She was living in an elderly care home, although I hesitate to use the word care. It wasn’t where she belonged, that’s for sure. The place had an odor of canned spaghetti microwaved in a plastic…