Yorkshire Murder Thrillers 03-Cold Heart

A series of bizarre crimes across the English city of Sheffield brings a police detective and a PI together in an increasingly dangerous game . . .
Liam Bennet has just quit the force to become a private detective—and to his frustration, his first case is a weird petty crime while his good friend acting DCI Liz Miller is assigned a murder. Two murders, in fact—one recent, the other involving a skeletonized body, but both linked by pictures of dice at the scenes.
After Liz is attacked on the job, Liam visits her in hospital and they discover another odd connection: both Liam and the police are looking into teachers who’ve been victimised. Meanwhile, more dice keep turning up—though the crimes connected to them seem utterly random, ranging from the serious to the bizarre.
As the two close in on the mystery, will they be able to identify a pattern—or is their luck about to run out?