Body of Lies

The brand-new crime thriller from award-winning and Sunday Times bestselling author Jo Callaghan, featuring DCS Kat Frank and AI detective AIDE Lock. This novel plunges readers into a disturbing case where human suspicion clashes with AI manipulation, forcing protagonist Kat Frank to question everything she knows about truth and trust.

DCS Kat Frank returns to the Future Policing Unit following a devastating loss, immediately confronting a complex murder on Halloween night. The victim, a vocal opponent of AI, leaves behind a taunting message in binary code: Catch me if you can. As Kat investigates alongside her partner, AIDE Lock—the world’s first AI detective—the case escalates dramatically when a cyberattack cripples the National Grid, plunging the country into chaos.

• Features the return of DCS Kat Frank and AI detective AIDE Lock.
• Explores themes of human instinct versus AI logic in a world of deepfakes and deception.
• From the author of In the Blink of an Eye, winner of Theakstons Crime Novel of the Year.
• A fast-paced techno-thriller involving political motives and a nationwide crisis.

• Author: Callaghan, Jo
• Binding: Hardcover
• Language: English
• Print Length: 448 pages
• Publication Date: May 21, 2026
• ISBN-10: 1398535567
• ISBN-13: 978-1398535565
• Dimensions: 153 x 30 x 234mm
• Weight: 610g

With the killer always one step ahead and the country descending into darkness, Kat must decide if she can trust her AI partner to stop a killer before the lights go out for good. This intelligent, deftly plotted novel offers a fresh take on the detective duo trope.