Joe Ledger is back. This time the enemy is not as easily defined, nor found. Drones and auto pilot softwares are hacked opening the door to military and civilian vehicles being remotely hijacked and turned into suicidal weapons against society. Old enemies appear. Old friends turn up and suffer along with everyone at DMS. The action begins with a mission to South America and an attack at the first baseball game of the year. How do these fit together? Who are the people behind this? The simple answer is evil bastards. To find out exactly how evil they are, read the book. Be prepared to see characters you care about go through a really rough time. Hints as to who some of the principal characters are come to light. Violin, Church, Nicodemus all have secrets and some of those are revealed. If you have followed the series, you will get deeper into the DMS and its enemies. If you haven't, I would suggest starting with Patient Zero.