Deletion of Silent films of marion davies

Comment: Fails / in that it talks about the book without an additional source (for instance, how do we know that she starred in exactly 30 silent films?). Possibly fails . Without secondary sources,  issues are possible as well
Stance: delete
Cited policy: Wikipedia:No original research (WP:NOR||WP:V||WP:NPROMO||WP:NPOV)