Black Widow

She was first introduced as a Russian spy, an antagonist of the superhero Iron Man. She later defected to the United States, becoming an agent of S.H.I.E.L.D., and a member of the superhero team the Avengers
==Recommended Reading==
Black Widow: Web of Intrigue (Marvel FanFare # 10-13)
DareDevil V1 #187-190
Uncanny X-Men # 268
Captain America : Streets of Poison (Captian America # 372-378)
Black Widow : Itsy Bitsy Spider
The Widow (Daredevil V2 # 61-66)
Black Widow: HomeComing
Captian America V5 #27-50, V1 # 600-619
Black Widow: Kiss or Kill
Black Widow: The Name of the Rose
Secret Avengers # 16-21
Amazing Spider-Man: End of the Earth (Amazing Spider-Man # 682-687)
Winter Solider (Brubaker's Run)