Deletion of Tropes in Agatha Christie's novels (2nd nomination)

Comment: to Agatha Christie, which already contains a substantial "themes" section.  As I explained before, article deletion is not a punishment for poorly-written articles.  If the topic were |non-notable or |unverifiable, those would be perfectly valid reasons to delete the page; however, |being forced to revert to a version of the page you dislike is not (https://en.wikipedia.org/w/index.php?title=Wikipedia:No_original_research/Noticeboard&diff=571454112&oldid=571450948 discussion here).  I'm not opposed to keeping this article, especially if the "themes" section from the parent article were merged in here, instead; it seems to be somewhat notable and easy enough to research if one puts in the effort
Stance: merge
Cited policy: Wikipedia:Notability (WP:N||WP:V||WP:IJDLI)