Communication-or the lack thereof--is the subject of this sly update of the picaresque novel. No One Writes Back is the story of a young man who leaves home with only his blind dog, an MP3 player, and a book, traveling aimlessly for three years, from motel to motel, meeting people on the road. Rather than learn the names of his fellow travelers--or even invent nicknames for them--he assigns them numbers. There's 239, who once...