He has written a book titled "the Psychology of Selling," which aims to help people become part of the top 20 percent.

他写了一本书，字名是“销售心理学”——旨在帮助人们成为顶端的20%。

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This book is a perfect companion to guitar For Dummies, the top-selling guitar instructional book in the U. S., which has sold 750,000 copies to date.

傻瓜吉他伴侣是一本完美的，最畅销的吉他书，在美国，已售出75万份最新的教学书。

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Oh, and a tell-tale sign of this will be if a top selling book is about how to invest in IPOs.

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