Missing Before Daylight by Carolyn Arnold

She wakes surrounded by an inky black darkness and can barely breathe. A sack is covering her head, and her hands are tied behind her back. She desperately tries to struggle free as she hears footsteps walking toward her. She silently starts to cry as a chilling voice whispers “It’s time to pay for what you did…”

When Detective Amanda Steele is called to the murder scene of a young gas station clerk just before dawn, she assumes it must be a robbery gone tragically wrong. But when she discovers nothing has been stolen, she knows the motive must be far more personal.
Watching the security footage, Amanda is shocked to witness the cold-blooded killer not only shoot the clerk dead but abduct a customer. And her heart stops when she recognizes the customer as her former colleague, Katherine Graves. As Amanda breaks the news to Katherine’s heartbroken Aunt May, she vows to do whatever it takes to bring her niece home alive.
Desperate for a lead, Amanda and her partner, Trent, search Katherine’s home. Soon, they discover that despite no longer being with the police department, Katherine has a long list of very dangerous enemies. Enemies who have been sending her anonymous letters promising revenge.

The more Amanda digs into Katherine’s past, the longer her list of suspects becomes. But when May is sent a ransom demand and a picture of Katherine close to death, Amanda knows time is running out. With only hours left to find Katherine alive, Amanda is prepared to risk everything to keep her promise to May, even her own life…