Pale horse coming - Stephen Hunter

The Year is 1951. A smooth-talking Chicago lawyer has come to chat with Sam Vincent, a former prosecutor, about a dangerous unknown - a prison for violent black convicts in Thebes, Mississippi, a place of many questions but no answers. Would Sam, a white man and a Southerner, be willing to investigate? When Sam vanishes in the mists and swamps, his old friend Earl Swagger packs his gun and heads to Thebes where he discovers sinister secrets that go far beyond the prison walls. The whole town guards itself from nosy strangers with a private army of brutal, gun-toting, Klan-type thugs and rednecks. After barely escaping, Earl vows to right things and reclaim Thebes from the throes of a sinister conspiracy. But first, he enlists just a little help from his friends. Featuring the same fast-paced action and page-turning thrills that made Hot Springs a heart-stopping bestseller, Pale Horse Coming is a triumphant successor.