Zero Day by David Baldacci

In this heart-racing thriller by bestselling writer David Baldacci, the author of Hell’s Corner, military investigator John Puller is called to a remote, rural area where an entire family have been murdered in their home.

John Puller is a former war hero who has become the best military investigator in the U.S. Army’s Criminal Investigative Division. He is a loner who has an unstoppable determination for finding the truth.

As he investigates the murder case, John learns that the dead husband was in the army and the wife worked for a Pentagon contractor. John makes plenty of enemies whilst working this case, including a local homicide detective, a woman who has personal problems of her own.