The Girl in the Glass Case by Devashish Sardana

Simone Singh, assistant superintendent of police, would rather spend her days locking up criminals than apologizing for her lack of social skills. And she refuses to let anyone stand in the way of her pursuit of the Doll Maker, a ruthless serial killer who dresses up little kids as Barbie dolls and displays their bodies in glass cases. But Simone knows that time is running out to piece together the clues as the Doll Maker has made it clear that the killings have only just begun . . .

Another serial killer, the Clipper, who enjoyed nine years of infamy as India's most notorious butcher, erupts into an all-consuming rage when he is cast aside by the media in favour of the sick new slayer-the Doll Maker. The Clipper turns his fury into blood-soaked revenge to capture the top spot. As corpses start to pile up, Simone fights to maneuver the Doll Maker into a clever trap. But the Clipper is hell-bent on striking first and regaining the crown with his most grisly murder yet.