Leverage
(Book)

FBI Agent Jade Monroe's partner, J.T. Harper, has abruptly disappeared. The entire Serial Crimes Division hands off its current cases to concentrate on finding one of their own. They soon learn that J.T.'s sister, Julie, is also missing. Since she has no connection to the FBI, they fear she has been kidnapped and is being used as leverage in a twisted vendetta against J.T. A video is delivered to the FBI with Julie as the unfortunate spokesperson, leading the team to believe that this mysterious kidnapper has more on his mind--and a deeper connection to J.T. Harper--than they could possibly know. The mayhem worsens when J.T.'s former partner is murdered and dumped in front of the FBI headquarters as a sign of the kidnapper's intentions. Now J.T.'s life is in the crosshairs, and as the days tick by, Julie's life is in jeopardy too.