Grave Robber's Chronicles 9 wasn't written by Nanpai's Third Uncle or Sinistress One Knife because the completeness and cohesiveness of the Grave Robber's Chronicles series was widely questioned. Nanpai's Third Uncle had publicly stated that he would not continue to write the continuation of the Grave Robber's Chronicles series, and Sinistress One Knife had not made any comments about Grave Robber's Chronicles 9. Therefore, the author of Grave Robber's Chronicles 9 was unknown.