Blood, She Read

Petra lives a charmed life, but only in the magical sense. Her absentee father is a criminal, her mother is emotionally dead, and everyone at her new school knows she comes from a family of witches. No matter what, she's determined to fit in, but when a cop asks for her help with a murder case, the whole town finds out. And to make matters worse, the cop points his investigation toward Finn Harris, a guy from school who girls can't resist.
Including Petra. Although she knows Finn's hiding something, she's determined to uncover his secrets. But as her feelings for him grow, she'll have to make a choice: does she follow her head or follow her heart? *Blood, She Read is a young adult paranormal novel with strong romantic elements. It was originally published in 2012.