Silentcide: The Art of Undetected Killing

An assassin's refusal to kill turns deadly.

Chris Davis and his sister are orphaned after murdering their father. For a decade, they're confined to an Amish farm and trained to become master assassins in the art of undetected killing.

While the siblings complete missions in Rome and Antwerp, a desperate Boston hedge fund manager makes a big bet that a biotech company has a cancer cure. Then the stock drops 73% and keeps falling.

In apparent retaliation, the siblings are assigned to murder a ...