I, Witness: The gripping psychological thriller that you won't be able to put down (Paperback)

'A cracking thriller and a great female protagonist.' C.J. Tudor, author of Sunday Times Bestseller The Chalk Man

'I couldn't put I,Witness down, this is a 2018 must-read' Phoebe Morgan, author of The Doll House

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They say I'm a murderer.

Six years ago, Kate Reynolds was found holding the body of her best friend; covered in blood, and clutching the knife that killed her.

I plead guilty.

Kate has been in prison ever since, but now her sentence is up. She is being released.

But the truth is, I didn't do it.

There's only one person who can help: Private Investigator Madison Attallee, the first officer on the scene all those years ago.

But uncovering the truth means catching a killer.

An incredibly gripping thriller with a twist you'll never see coming. Fans of Persons Unknown by Susie Steiner, Strike's The Cuckoo's Calling by Robert Galbraith, Close to Home by Cara Hunter and The Child by Fiona Barton will love I,Witness.

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What everyone is saying about this gripping debut:

'An absolutely gripping thriller founded on the horror of familial abuse and a great, flawed, female PI. There will be more Madison Attalee, I hope.' Radio 4's Dame Jenni Murray

'Cracking thriller and a great female protagonist. Swearing, smoking, rock-music loving (and not neurotic or passive!) My kind of woman.' C.J. Tudor, Sunday Times bestselling author of The Chalk Man

'I was swept away by this punchy, pacy thriller with its sharp characterisation and confident plotting. I devoured it in a single day. I particularly loved Madison's fabulously chain-smoking, hyper-feminine sharpness. There were so many things done well here - the presentation of domestic abuse, dysfunctional families, the uneven dynamic of female friendships that border on bullying - so much to enjoy. So looking forward to the next one.' Helen Callaghan, author of Sunday Times bestseller Dear Amy

'Tough and uncompromising, I, Witness had me totally gripped. I'm looking forward to hearing more from PI Madison Attalee.' Alex Lake, author of Killing Kate, After Anna and Copy Cat

'I couldn't put I,Witness down. A hugely accomplished novel with a dark, sad story at its heart - the characters are so well drawn that I felt every twist along with them as Mackay expertly manipulates the reader. With a wonderful, chain-smoking and perfume-spraying private detective driving the narrative, this is a 2018 must-read.' Phoebe Morgan, author of The Doll House

'Totally engaging, fast-paced and edgy ... completely captivating. I, Witness kept me guessing till the very end. Pick this book up if you're after apage-turner with attitude.' Elle Croft, author of The Guilty Wife

'Cutting-edgegripping.' Sam King, author of The Choice

'Had me hooked within two pages, it has every bit as much appeal as some of the bestsellers of the last few years, like Girl on the Train.' Robert Scragg, author of What Falls Between the Cracks