Black Widow

http://hip1.sjvls.org/ipac20/ipac.jsp?session=1V45036X10U12.172100&menu=search&aspect=subtab255&npp=20&ipp=20&spp=100&profile=thq&ri=4&source=~!horizon&index=.TW&term=black+widow++.AW%3DStohl&x=16&y=8&aspect=subtab255Black Widow by Margaret Stohl

Natasha Romanov, called the Black Widow, agent of S.H.I.E.L.D, rescues a young girl from Ivan, the man who once trained her as an assassin--and eight years later she is called upon to protect the teenage Ava from a threat from the past--and possibly from S.H.I.E.L.D itself.