Mazer, Norma Fox. The Missing Girl. 2008.
This was a disturbing book. The chapters alternate between five sisters and a man who is obsessed with them. The sisters are having lots of problems at home-- their father is out of a job and the mother is making the only income. She is stressed out and they have no money. The family makes the decision to send one of the sisters to an Aunt so she can help out and take the burden off the family. Meanwhile, a pedophile is obsessed with the girls. He looks forward to seeing them every day. His only problem is choosing which of them he wants. They are all enticing to him in one way or another.
The pedophilia angle can be disturbing to some readers so I would urge caution for readers that might be sensitive to this sort of thing. Otherwise, this was a great book and I had a hard time putting it down.