王某自幼没了父母，他在政府的帮助下读完了中学。之后，他响应国家的号召，自愿到部队去服兵役。在部队，因表现出色，他多次受到表扬。退役后，他自己开了个小批发部，干起了个体经营。由于认真守法，积极纳税，他多次被税务部门评为纳税先进个体户，还被推选为城区人大代表。

结合上述材料，请运用所学知识回答下列问题：

    My friend Tom lives on Sun Street. It is near his school. He usually goes to school on foot. But sometimes he goes to school by bike. His father is a doctor. He goes to work by car. His mother is a teacher. She teaches English. She goes to work by metro. Today is Sunday. Tom doesn't have any lessons. He wants to go to Nanjing by train.

This is a book ____ London.