It was written by an unknown author.

该书的作者是匿名的。

youdao

This quote from an unknown author might be the most apt description of my life as an entrepreneur.

FORBES: Why Big Questions And Bad Decisions Make Better Entrepreneurs

Writing The Seven Habits of Highly Effective Dragon-Slayers was probably not what the unknown author of the Anglo-Saxon poem Beowulf had in mind.

FORBES: Leadership lessons from Beowulf

As a relatively unknown author this award will give her exposure to a wider and mass audience that she may not have reached and is a perfect example of the influence of the Whitbread.

BBC: NEWS | Entertainment | Levy takes Whitbread novel prize