Her Dying Secret by Lisa Regan

She gently opens the woman’s tightly clenched fist, uncurling each finger to reveal a square of folded paper hidden in her palm. Scrawled in thick crayon, beside a child’s crooked drawing of a red flower, is one word that sends a shiver through the evening mist: HELP

It was supposed to be a routine road accident recovery, but the moment Detective Josie Quinn sees the passenger—pale and painfully thin, a sharp tool lodged in her stomach—it’s clear she was the victim of something far more sinister, and likely dead before the crash. Watching the driver taken away in an ambulance, questions spin through Josie’s mind. Where were these two women going? Was the driver trying to save a life, or hide a body? And—most heartbreaking of all—is there a child in danger, crying out for help with no reply?
Josie quickly identifies the crash survivor as Mira Summers, a singleton and animal-lover on her way home from nearby stables. Mira swears she doesn’t know who the woman in the car beside her is, or how she was injured. And when she’s diagnosed with concussion and memory loss, Josie is forced to back down.
But the discovery of Mira’s prints on the child’s drawing is all the proof Josie needs that Mira knows more than she’s letting on, and a witness saw Mira meeting with a man with a gnarled diamond-shaped tattoo at the stables. In a race against the clock to track down this elusive man, Josie faces danger from the most unexpected places. Pushed to her limit, can she stay alive long enough to catch the killer and save the life of an innocent child?