NEW YORK CITY IS IN THE HANDS OF A MADMAN, AND THE MAYOR'S DAUGHTER IS IN THE CROSSHAIRS!Mayor Lukas Burton has it all: wealth, power, a beautiful and brilliant wife, and the apple of his eye--nine-year old Abigail. But when she vanishes in broad daylight from Central Park, leaving no clues or witnesses, he will risk everything to bring her home safely.Running out of time and patience, his wife Claire takes matters into her own hands, and calls on ex-flame and former Special Ops sniper, Carter Matheson to hunt down the faceless foe.A ransom note arrives. Payment is made. And Abigail is returned. But with one caveat: pay a second ransom or the girl, and the entire Gracie Mansion neighborhood with be blown sky high. Soon, Carter finds ulterior motives behind Lukas and his personal attorney, as he soon comes face to face with a former foe known as Scorpion.Facing an impossible deadline, Carter and his team must race the clock, find the kidnappers, and disarm a ticking bomb, or risk losing little Abigail and the lives of thousands more.KNUCKLE DOWN is a story of revenge, greed and power, all wrapped in a page-turning and non-stop suspense thriller that will have your heart racing until the final page.