The complete audiobook is available for purchase at Audible.com:
https://www.audible.com/pd/B0DC1YMXXS
A Difficult Problem
By Anna Katharine Green
Narrated by Martha H. Weller
Lucy Holmes has been happily married for six months. Her husband is expected home from a business trip to Philadelphia when she receives the following cryptic telegram: "Come at once. Your husband found dead in his room this morning. Doctors say heart disease. Please telegraph." Foul play is suspected, but the search for means and motive is not such a straightforward process.
