Carolyn Wells 
Mark of Cain 

In this edge-of-your-seat thriller, renowned mystery writer Carolyn Wells strays from the enclaves of the well-to-do that usually serve as the settings for her novels and introduces elements of gritty street life. When an affluent nature lover is found dead in the woods, his family, friends and staff attempt to crack the case. Chief among them is an unlikely amateur detective, Fibsy Mc Guire, a young man who hails from an Irish immigrant family.