The Letter N provides some nice eclectic titles, some of which only lasted two issues, like NEWSPAPER ADVENTURE STORIES. I don't know why that didn't last - I would've bought them.
Nickel Western January 1933
North West Romances, Spring 1947
Newspaper Adventure Stories, Vol 1, No. 2, 1934
New Mystery Adventures, March 1935
New Fiction Library, 1932
Navy Stories, February 1929
Nick Carter, June 1933