Payback - J L Lemon

Someone knows Savannah's secrets and they're using them against her. Her six year-old niece is abducted and the kidnapper sends Savannah racing against the clock finding clues to the girl's location. The bizarre scavenger hunt plunges the detective into uncomfortable situations, painful childhood memories and facing her most terrifying fears. When she discovers the identity of the abductor, Savannah realizes that without a miracle, neither she nor Lindsey will survive the night.