The book "Mark of the Green Arrow: A Mystery Story" by Roy J. Snell is an exciting detective story that will take you into an exciting world of investigation and mystery. The main character, who receives expert hints in the form of green arrows, goes in search of criminals and decides to conduct his own investigation. Readers will be able to enjoy the intrigue, unexpected plot twists and unpredictable events unfolding on every page of this exciting book. "The Mark of the Green Arrow: A Mystery Story" is a work that will leave you anxiously waiting for its resolution until the very end.