The Scarlet Letters: Library Edition

Martha Lawrence came to Ellery Queen claiming that her husband's jealousy was putting her in danger. But did the man have grounds for his rage? In order to try and help him understand, Ellery gets his secretary a job in the Lawrence household. Then the unsigned letters begin to arrive and Ellery Queen is dragged all over New York in search of the truth. --This text refers to the Paperback edition.