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Leave No Trace

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Leave No Trace

By: Jo Callaghan
Narrated by: Rose Akroyd
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FROM THE AUTHOR OF THE SUNDAY TIMES BESTSELLER IN THE BLINK OF AN EYE
Winner of the Theakston Old Peculier Crime Novel of the Year 2024
Winner of the Crime Writers’ Association ILP John Creasey (New Blood) Dagger 2024

One detective driven by instinct, the other by logic.
It will take both to find a killer who knows the true meaning of fear . . .

When the body of a man is found crucified at the top of Mount Judd, DCS Kat Frank and AIDE Lock – the world’s first AI detective – are thrust into the spotlight with their first live case.

But when they discover another man dead – also crucified – it appears that the killer is only just getting started. When the Future Policing Unit issues an extraordinary warning to local men to avoid drinking in pubs, being out alone late at night and going home with strangers, they face a hostile media frenzy. Whilst they desperately search for connections between the victims, time is running out for them to join the dots and prevent another death.

And if Kat and Lock know anything, it’s that killers rarely stop – until they are made to.

‘Confirms Callaghan as a new force to be reckoned with in crime’ Daily Mail

‘Jo Callaghan is an outstanding talent’ Jane Casey

‘I couldn’t turn the pages fast enough’ Nikki Smith

‘A smart, agile, immaculately plotted and moving thriller that is unswervingly gripping and scary, and at the same time beautifully tender and humane’ Nicci French

‘With Leave No Trace, Jo Callaghan cements her status as a crime fiction force to be reckoned with’ Caz Frear

‘Brilliant, rapidly paced and plotted . . . Another masterpiece’ Imran Mahmood

‘Every bit as smart, compelling and insightful as her debut . . . A terrific read!’ Gytha Lodge

‘Jo Callaghan has done it again in this intricately plotted, humorous and incredibly moving thriller . . . I absolutely loved it’ Laura Marshall

‘Balanced, nuanced, intelligent, provocative’ Amanda Reynolds

‘Another exciting and thought-provoking book from Jo Callaghan that combines cutting-edge tech with a classic police procedural . . . Hugely human and big-hearted. Brava!’ Sarah Hilary
Crime Thrillers Fiction Mystery Police Procedural Psychological Science Fiction Suspense Technothrillers Thriller Thriller & Suspense Crime Technology Heartfelt
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Continue the series

Human Remains cover art
Human Remains By: Jo Callaghan

Critic Reviews

‘As brilliantly plotted and innovative as In The Blink Of An Eye, AIDE Lock & DCS Frank are back in Leave No Trace. This time attempting to solve horrific murders in the dead of winter; the story chilled me to the bone and I couldn’t turn the pages fast enough. Callaghan writes with such intelligence; interspersing humour with moments of utter heartbreak’ Nikki Smith

‘I am rapidly becoming a huge Jo Callaghan fan. Leave No Trace was every bit as smart, compelling and insightful as her debut, and where these books really excel is in the emotional weight they bring to the thriller genre. A terrific read!’ Gytha Lodge

‘With Leave No Trace, Jo Callaghan cements her status as a crime fiction force to be reckoned with. Emotional and enthralling, with great dashes of humour throughout. It also includes one of the most heart-stopping yet satisfying endings I've read in a long time. More please, Jo!’ Caz Frear


'Jo Callaghan has done it again in this intricately plotted, humorous and incredibly moving thriller. As well as being a gripping, fast-moving story in its own right, it has so much to say about the complementary roles of logic and emotion in policing (and life!), the complexities of grief and what it means to be human. I absolutely loved it' Laura Marshall


‘Balanced, nuanced, intelligent, provocative’ Amanda Reynolds

All stars
Most relevant
Second book in the series and I loved it!! So clever, so good. I love the dynamic between Kat and Locke and the team. Very unique. I know I said in my last review about how smart the author must be, but wow she really is. She writes Locke exactly as I would imagine an AI detective to be. Not that I could ever imagine this up myself but I feel like she nails it, and makes him feel so realistic.

So clever

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