Long before he was the taco seller whose 'Gringo Dog' recipe made him famous throughout Mexico City, our hero was an aspiring artist: an artist, that is, till his would-be girlfriend was stolen by Diego Rivera, and his dreams snuffed out by his hypochondriac mother. Now our hero is resident in a retirement home, where fending off boredom is far more grueling than making tacos. Plagued by the literary salon that bumps about his building's lobby and...