How could your good friend become your worst enemy?

I lost my child because of you, my only child.

Eileen and Heather have always looked out for each other. But two years ago Eileen lost her son and she blames Heather and her family for the tragic loss.

And I want you to know how that feels.

Now she wants Heather and her daughter to suffer in the same way.

Sergeant Claire Boyle is caught in the crossfire - but she has her own child to think about now.

''A corker of a book, compellingly readable, intriguing and hugely enjoyable'' Liz Nugent

''A perfectly engineered crime novel . . . Crowley is brilliant at creating gripping scenarios'' Jane Casey