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上文中,被绑架男孩博比的爸爸看完博比写给自己的信后,就去了图书馆。回来后,他立即和那位联邦调查人员一起飞往加利福尼亚州,这一次他们会有什么意外的发现吗?
In the above article, the kidnapped boy Bobby’s father went to the library after reading Bobby’s letter. After returning, he immediately flew to California with the federal investigator. Will they have any unexpected discoveries this time?