Harry Peter taught science at a high school. Once he went to a bookshop and bought some books. All of them were expensive ones. He left them in his car in a quiet street. Then he went to buy some fruits in the market. At six o’clock he came back to his car. He was surprised to find one of the windows was open, and the books were gone. Harry drove back to his home in Lake Street. That night he wrote a letter to a newspaper. The next day he went to the police.

On Friday people read an advertisement（广告） in the newspaper:

Books wanted

Have you any books that you no longer want? I buy old and modern books. Open all day on Saturdays. Harry Peter,18 Lake Street.

Harry stayed at home on Saturday. His first visitor came at nine o’clock. Harry took him to the kitchen（厨房）. He was sure that another man was coming. At ten o’clock, the second man arrived. He had a bag under his arm.

“Mr Peter?” The man asked.

 “That’s right,” Harry said, “Can I help you?”

“I have some books. You buy books, don’t you?”

“Yes. Bring them in. I’ll have a look at them.”

Soon the books were on the table. “Come in now,” Harry called out, “And bring the list（目录）.

A policeman came in. He read the titles（书名） on the books, and then those on the list on his hands. They were the same. “Come with me, sir,” the policeman said to the man.