The Good Girl by Mary Kubica

Mia is the younger daughter of a wealthy judge in the Chicago area.  Her sister Grace is the judge's protege: straight A's, graduated magna cum laude, law school, making firm partner in less than 5 years.  Mia, on the other hand, spent her teenage years behaving like a juvenile delinquent.  Her father bribed the police to not charge her after nights of binge drinking and pot smoking.  On her 18th birthday, Mia packed up and left.  She became an artist, then an art teacher at a school for troubled youth.  Her tiny apartment costs nearly her entire salary.  Their father still pays for Grace's lavish apartment.

One night Mia is to meet her on-again off-again boyfriend at a bar, but as often happens he is a no show (it may be inferred he is sleeping with his boss).  Mia meets a handsome man and, slightly tipsy, returns to his house for a no-strings one night stand.  Instead, she finds herself being kidnapped.  Colin is a hired hit man, with instructions to deliver her to an African terrorist.  Colin is suspicious however that Dalmar will do more than just hold her for ransom.  Getting cold feet at the drop off, he takes Mia to his father's abandoned hunting cabin in Minnesota.

Over the next few weeks, Mia and Colin, calling themselves Chloe and Owen, form a bond.  They have to depend on each other or they will freeze to death in the Minnesota winter.  Whether Stockholm syndrome (having feelings for your kidnapper) or something else, they become lovers.  Although she does not know it, Mia/Chloe becomes pregnant.

Back at home, Mia's mother desperately tries to hold out hope her daughter is alive.  Meanwhile the judge seems uncaring.  Eve becomes more and more attached to Gabe,the detective assigned to her daughter's case.  When Mia is finally "rescued", she develops traumatic amnesia.  She is unable to remember what happened.  Her parents assume the pregnancy is a result of rape. 

The story flips back and forth from the perspective of Eve, Gabe, and Colin/Owen and flashback to present and reverse.  But let me just say, the ending was a TOTAL surprise.  The last chapter is told from Mia's perspective in retrospect.  It explains everything.  And, just WOW.

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