Blood oath

The ultimate secret. The ultimate agent. The President's vampire. Zach Barrows is an ambitious young White House staffer whose career takes an unexpected turn when he's partnered with Nathaniel Cade, a secret agent sworn to protect the president. But Cade is no ordinary civil servant. Bound by a special blood oath, Cade has spent more than 140 years in service to the president, battling nightmares...