The Seventh Girl

She thought he was gone. She was wrong.

Fifteen years ago a serial killer was on a rampage murdering young women in Middlehampton. Then the killings stopped, and the murderer evaded the police.
Detective Kat Ballantyne is on the hunt for the Origami Killer who murdered her best friend, Liv years ago and is now killing more women, leaving a pink origami heart in their bras, lavender-soaked wheat grains in their throats, and then strangling them. 
With her new associate, Tom by her side, she begins to investigate with little to go on as it's such an odd MO. With her husband, Ivan and young son Riley at home, she spends hours searching all leads even when it seems someone "inside" may be thwarting her efforts.