Penumbra (Spook Squad)

TWIN KILLING
 
Agent Sam Ryan wants out of the Special Investigations Unit. She€s sick of the attitude from her partner, Gabriel Stern. She€s sick of the paperwork. Most of all, she€s sick of feeling lonely. But her boss isn€t about to let her go that easily. He gives Sam a choice: either stay stuck in her office or guard a clone replacement of Dan Wetherton, a government minister. Sam reluctantly chooses the latter€"even though she suspects she€s being used as bait to draw out the SIU€s elusive nemesis.
 
Gabriel would like nothing better than to be on his own, without a partner to hold him back. Then he learns that Sam has been assigned to protect Wetherton€"or whatever it is that€s replaced him. Wetherton€s clone could have come from only one place: Hopeworth, the military base that contains the secrets of Sam€s past. Determined to protect her, Gabriel is drawn into a fight against unspeakable evil. And all too soon, Sam and Gabriel discover that the connection between them is far more powerful than anyone could ever have imagined.