Murder Book by Thomas Perry
It's too hard for private investigator Harry Duncan to say no to his ex-wife, U.S. Attorney Ellen Leicester, when she asks him to look into criminal activity in some small towns in Indiana. There have been a series of deaths and threats to local businesses in these rural communities. When Harry arrives in Parkman's Elbow, Indiana, he is immediately threatened and shaken down for money. In addition, some businesses are paying protection money and residents are being pressured to leave town and not come back. Harry tries to uncover the reason behind the crimes while attempting to apprehend the bad guys and get enough evidence for Ellen to put them in prison for a long time. Murder Book is the latest novel by Thomas Perry and is a great read-alike for the Jack Reacher series by Lee Child.