Was the Legend of the Best Servant written by Yan Yu? There were so many versions. Regarding this question, I'm not sure who you're referring to. However, if you are referring to the novel, I can tell you that this novel is written by. " The Best Servant " was a very popular online novel that had been published in many versions. Although it was not certain that all the versions of this novel were written by the same person, it was certain that it had become a very well-known online novel.