It happened to me recently. I was telling someone how much I had enjoyed reading Barack Obama’s Dreams From My Father and how it had changed my views of our President. A friend I was talking to agreed with me that it was, in his words, “a brilliantly written book”. However, he then went on to talk about Mr Obama in a way which suggested he had no idea of his background at all. I sensed that I was talking to a book liar.

上面的内容是2013年高考英语全国卷Ⅰ阅读C的一个段落。不太明白最后一句中的 book liar。求教各位，谢谢！