The bid

"When drone expert James Chadwick disappears, Cruxys Solutions investigators Ruth Gonzales and Andy Vaslik are assigned to track his last movements. With few clues to go on, the hunt moves from London to New York, gathering speed as they close in on a horrifying plan to kill the US president and inflict total damage on an Air Force base. The countdown to a new era of destruction has begun. Gonzalez and Vaslik are the only ones who can stop it."--Amazon.com