I cannot thank enough Jess Barratt of Simon and Schuster for sending me a copy of Body Of Lies by Jo Callaghan. I have adored this series and cannot believe Body of Lies is supposed to be the final book. I’m devastated and refuse to accept it! It’s my pleasure to share my somewhat inadequate review of Body of Lies today. 

You’ll also find my reviews of Jo’s In the Blink of an Eye here, of Leave No Trace here and of Human Remains here. 

Body of Lies is published by Simon and Schuster on 21st May 2026 and is available for pre-order here. 

Body of Lies

The brand-new thriller featuring DCS Kat Frank and AIDE Lock from the award-winning and Sunday Times bestselling author of In the Blink of an Eye.

Human suspicion. AI manipulation. Who can you trust when truth has no meaning? 

DCS Kat Frank returns to work at the Future Policing Unit after a tragic loss, only to find herself thrust into a new high-profile case. On the night of Halloween a local MP is found murdered, with a taunting message written in binary code that seems to target Kat specifically: Catch me if you can.

The victim’s anti-AI sentiments suggest a political motive, and as Kat investigates with her partner AIDE Lock – the world’s first AI detective – she finds herself once again battling her own prejudices about the technological future he represents. But when a cyberattack takes out the National Grid, Kat and Lock have to race against the clock to track down the hacker before thousands die.

Tangled in a web of suspicion and deception, Kat must choose who and what to believe when the truth seems to defy both instinct and logic.

Can she set aside her old doubts and put her faith in her AI partner one last time?

Or will this case send Lock down a path she just can’t follow – a path that will leave humanity behind for good?

My Review of Body of Lies

Kat’s got a new case on Hallowe’en.

I am at a complete loss to know how to review Body of Lies. I thought it was utterly fabulous. There are so many aspects to Jo Callaghan’s insightful writing that each book rewards multiple reads and Body of Lies is no exception.

Obviously plot is of supreme importance and in Body of Lies there is a breathtaking, gripping, terrifying (just choose your own superlative and apply it) story. The intriguing police procedural element is layered with aspects of national and international importance and has such resonance in today’s world that the real life potential of this fiction is unnervingly plausible. I cannot stop contemplating what happens, so that the effect of reading Body of Lies is profound. It’s impossible to review Body of Lies without spoilers, but I cannot stress strongly enough how good it is or how fitting the title is.

With Kat’s partner, Lock, being AI, the effects and implications of how we create, use and control AI all feature throughout the book and I adore Jo Callaghan’s skill in presenting both positive and negative aspects without steering the reader to one particular viewpoint. Body of Lies is a book that is intelligently written and not only entertains flawlessly, but that makes the reader think long after the final page is read. 

However, amongst a superb plot are themes of humanity that thrum with sensitive understanding, and affect the reader emotionally too. Kat’s PTSD following events in Human Remains, her ongoing grief at losing her husband, her desire to protect her adult son Cam as well as give him freedom and autonomy, her professionalism and strength as a DCS and her vulnerability, loneliness and compassion, all combine to make her a sublime character. Add in politics, national and international security, cyber attacks, trust, betrayal, zealousness and professional relationships, and Body of Lies transcends mere entertainment.

I realise this review is slightly vague as I really don’t want to spoil the story for others, but let me just say that Body of Lies is magnificent. It appeals to a wide range of emotions, and engages the reader completely. Indeed, I defy any reader not to shed a tear in reading it. Jo Callaghan is not only a sublime author, but her writing illustrates her as a superbly human individual who cares about her characters. Body of Lies is completely wonderful and not to be missed. 

About Jo Callaghan

Author photo courtesy of Edward Moss

Jo Callaghan works full time as a senior strategist, carrying out research into the future impact of AI and genomics on the workforce. She was a student of the Writers’ Academy Course (Penguin Random House) and was longlisted for the Mslexia Novel Writing Competition and Bath Novel Competition. After losing her husband to cancer in 2019 when she was just forty-nine, she started writing In the Blink of an Eye, her debut crime novel, which explores learning to live with loss and what it means to be human. She lives with her two children in the Midlands.

For further information, follow Jo on Twitter/X @JoCallaghanKat  or find her on Instagram and Bluesky.