It has been called one of the most influential nonfiction books of the twentieth century.

它被称为最有影响力的人物之一，二十世纪的小说书籍。

It's an app that pulls out the most important insights from nonfiction books and condenses them down to just 15 minutes.

这是一款从非小说类书籍中提取重要见解，并将其浓缩到15分钟的应用程序。