All About Jenny — D.J. Manly

Mark has been raising his niece since she was a small child. Abandoning his own life in the big city, he settles in a small town and devotes himself to Jenny. When Mark's sister dies in an accident, Mark is given full custody of his precocious twelve-year-old niece. Just when he thinks the worst is over, he finds out that his sister left instructions to contact Jenny's father, a man she had always refused to name.

Mark is terrified that Jenny's father will try to take Jenny away from him but Cole Waters is not anything like he expects at all.