Cry For Help: An addictive and gripping mystery and suspense novel (Detective Madison Harper Book 2) by Wendy Dranfield - Kindle Edition

Book 1 has been posted a couple of times, so hopefully you got it. They are standalone, but it's nice to read in order...

Shivering in the early morning chill, the caretaker flips the switch on the Ferris wheel and stumbles back in shock. The teenage girl’s body is slumped in a halo of pretty colored lights, long red hair spilling over her tear-stained cheeks, her eyes fixed forever on her dangling feet.

When teenager Nikki Jackson’s body is found at an amusement park, just hours after Fourth of July fireworks lit up the night sky, the Lost Creek police rule her death as suicide—a devastating final act from a girl who had lost all hope. But the absence of the knife used to make the wounds on her delicate wrists makes Detective Madison Harper think otherwise. And the partial fingerprint found on the girl’s face proves her right. Someone else was with Nikki in her final moments…

Back home in Colorado for the first time in seven years to investigate the murder of a woman with ties to the son she lost to the care system, the pressure is on for Madison to work both cases at once. Fearing the team has missed a vital clue, Madison searches the crime scene alone and finds the last thing she ever expected: a note proving the victims knew each other, and that the cases are linked. Is this a coincidence, proof a dangerous murderer is on the loose, or a trap set to lead Madison off the trail?

It’s only when Madison finally finds the knife used to harm Nikki, tucked in an almost impossible to find hiding place, that she knows she is closing-in on a twisted killer. But the last person she expects to see dragged into the department in handcuffs is her own missing son…