Police corruption, whistleblowers and murder. DCI Katie Maguire investigates a string of police fatalities in the new gripping thriller from Graham Masterton.

ONLY SILENCE CAN KEEP YOU SAFE. Sergeant Kieran O'Regan was responsible for hunting down killers. Now he's become one of the dead: his decapitated body has been found in a graveyard, a tin whistle stuffed into his throat. O'Regan was due to give evidence at a trial for police corruption. His gruesome murder sends a clear message to whistleblowers: only silence is safe. DCI Katie Maguire is determined to uncover the truth. But corruption in the Garda stretches back decades. As more officers are horrifically silenced, Katie must decide who she can trust...

"PRAISE FOR THE KATIE MAGUIRE SERIES: 'One of this country’s most exciting crime novelists... if you have not read one, read them all now' Daily Mail. 'A first-class thriller, written with style... readers who don't know the Maguire novels should change that right now' Booklist. 'A tough and gritty thriller with an attractively feisty principle character'" - Irish Independent