Nero Blanc is the pseudonym of Steve Zettler and Cordelia Frances Biddle, who are husband and wife and serious crossword buffs. Biddle is also the author of the Martha Beale histor...view moreNero Blanc is the pseudonym of Steve Zettler and Cordelia Frances Biddle, who are husband and wife and serious crossword buffs. Biddle is also the author of the Martha Beale historical mystery series, which is set in Philadelphia, Zettler and Biddle’s hometown. Their website is www.crosswordmysteries.com.view less