Ear In The Wall, The by Arthur B. Reeve (1880 - 1936)

Craig Kennedy is a man who thinks outside the box. A skilled detective using the cutting edge technology of his time, he uses his skills to investigate crime. In this story he comes to the aid of a district attorney prior to re-election time as he seeks to resolve the problem of corruption in New York. Amazing how a novel written in 1916 can be so relevant to this day. - Summary by Howard Skyman