One for sorrow, two for joy

Edinburgh is gripped by the greatest terror it has ever known: a lone bomber is targeting victims across the city, and no one is safe.

Three for a girl, four for a boy

In their jobs, DCI Ava Turner and DI Luc Callanach deal with death every day. But when it becomes clear that every bomb is a trap designed to kill them too, the possibility of facing it themselves starts to feel all too real.

Five for silver, six for gold

With the body count rising daily and the bomber's methods becoming ever more horrifying, Ava and Luc must race to find out who is behind the attacks - or pay the ultimate price...

Seven for a secret never to be told...