This is book number 54 in the In Death series.
The woman's body was found on a bench in a New York City playground. She was clean, her hair neatly arranged, her makeup carefully applied. But other things were very wrong -- like the tattoo and piercings, clearly new. The clothes, decades out of date. The fatal wound hidden beneath a ribbon around her neck. And the note: Bad Mommy, written in crayon as if by a child. When Eve Dallas discovers that other young women -- who physically resemble the first victim -- have vanished, the clock starts ticking louder. To solve this case she'll need to find her way into the distant past and the cold depths of a shattered mind.