Past Master is the third book of the Thomas Clipper Mystery Series.

From a place you cannot see comes a sound you will not hear.

Fear stalks the small city of Bangor, Maine when a ruthless assassin begins claiming victims in long-range sniping attacks.

Lieutenant Thomas Clipper and his crew are already dealing with the baffling disappearance of a beautiful young woman and the savage death of another; as the body count rises, the looming specter of a possible serial killer terrorizes the city. But now, as the investigations expand, a seemingly unconnected series of sniper attacks weave a perplexing web of vengeance and retribution, and Clipper begins to wonder if there’s a connection after all.

In his search for answers, Clipper must seek a master sniper to guide him through the dark science of death from afar. But he finds much more than he bargained for, and the mystery only deepens when he realizes that history seems to be repeating itself—again.