Shadow - Dean Wesley Smith

Amoral, shrouded in secrecy, answerable to no one, Section 31 operates outside the constraints of either conscience or the law. They are the covert operations arm of Starfleet. Their mission: to protect the Federation at whatever cost.
Someone - or something - is trying to kill Seven of Nine. As the crew of the USS Voyager race against time to save millions of refugees from an imminent stellar collapse, the former Borg finds herself the target of several apparently random but potentially lethal "accidents". Their investigations reveal a truth more terrifying than anyone could have imagined, as Captain Kathryn Janeway and her crew fight for their lives against the most unexpected enemy of all...