In his travel adventures, Brown is bent on accuracy. He's not one to stint on depicting the grubbiness of Chinese trains, the ugliness of slums, or the crudity of inter-ethnic prejudices. If you too traveled to the four ends of China, this is basically what you'd see.
Brown has lots of report-worthy conversations on his way, and he speaks good Mandarin. But the relationships he forms come and go between trains. They arn't like the months- or years-long friendships Peter Hessler or Leslie T. Chang write about. At one point, passing through Shanghai, Brown says with typical honesty, "Leaning on the stern handrail, muffled against the morning cold, I was utterly alone in a city of perhaps 15,000,000 souls."
Still, it's a well conceived adventure. Brown covers parts of China (like the goddess Guanyin's island of Putuoshan, Hainan, or Kashgar), that I'd wanted to know about. He digs into the local past wherever he goes, and shines his flashlight far off the beaten track.