This was a thrilling story with many mysteries, most connected with the men who were involved in corruption in the local and state government. Mr. Knox the lawyer gets involved when a pretty young woman asks him to look for her father who had gone missing. The more he gets involved in the search, the more mysterious things become. But as well, the more he begins to love the young lady, even though she is wearing a huge diamond engagement ring. So much mystery happens each night , no matter if an empty house or a family home, with intruders and injuries. And still, the story remains somewhat lighthearted as the lawyer tries to be detective. And in spite of the inept attempts, the truth is eventually detected and all the mysteries worked out. I am looking forward to reading more of Mary Roberts Rinehart books. I thought the reader was brilliant! He really brought the story to life as he read each character in different voices.