From Pangu's opening of heaven to the battle of sealing gods, there are no ancient books at present In fact, Pangu did not appear in any ancient novel (especially as a character). Pangu is a character in ancient folk fairy tales, while Romance of the Gods is a novel of Ming Dynasty (its author is controversial, and most people think it is Xu). Based on folk myths and political changes at the end of Shang Dynasty and the beginning of Zhou Dynasty (official history divided into two parts, unofficial history divided into two parts and fiction divided into six parts, which are purely personal opinions).
If the landlord wants modern novels, I don't know if it is the earliest. I guess the landlord only wants to know because he recently read the novels of the red and yellow generation. In fact, most modern novels are based on the speculation in The Romance of the Gods, plus the author's imagination, folk myths and mythological ancient books. Some authors actually haven't even read The Romance of Gods. So the landlord doesn't have to worry about it, he thinks it is the kind that is more in line with the taste.