New York Times bestselling author David Hagberg continues his successful Kirk McGarvey series in Tower Down, a searing thriller about terrorist attacks on NYC's pencil towers.

A mercenary killer blows up a pencil tower in Manhattan, sending it crashing down and killing hundreds of people. CIA legend Kirk McGarvey believes someone in the Saudi Arabian government, feeling the pinch of declining oil revenues combined with the escalating costs of defending the country's borders against ISIS, is behind the attack. The Saudis hope to awaken America's military might against ISIS.

No one in the White House or the CIA wants to believe that more Americans could die. McGarvey, his partner Pete Boylan, and his longtime friend, computer genius Otto Rencke, are certain that another attack is imminent. The trio must stop the killer before he strikes again.