Kat and Lock Series by Jo Callaghan 2 Books Collection Set - Fiction - Paperback

Titles in This Set:
In The Blink of An Eye
Leave No Trace

Format: Paperback

Overview:
Dive into a gripping book collection from Jo Callaghan that fuses high-stakes crime with cutting-edge technology. In The Blink of An Eye introduces DCS Kat Frank, a widowed single mother and police officer who relies on her instincts as she teams with Lock, the world’s first Artificially Intelligent Detective Entity. Their mission begins with missing-person cold cases that suddenly become active, forcing a clash between Kat’s human intuition and Lock’s precise logic. Leave No Trace widen the lens as their investigative partnership faces its first live case after the crucifixion of a man on Mount Judd. The Future Policing Unit’s ominous warning to local men to avoid pubs adds a chilling, real-world texture to the thriller. This two-book collection offers a contemporary, propulsive police procedural with heart, exploring grief, resilience, and what it means to trust—and be trusted by—an AI ally. It’s a must-read for fans of smart crime, character-driven suspense, and tension-laden plotting.

What This Collection Covers:
Together, these novels build a cohesive foreshadowing of a new policing era, where human experience meets machine intelligence. The central dynamic—Kat’s instinct against Lock’s logic—drives each investigation, creating a fresh tension that sits at the core of these thrillers. The setting blends gritty, procedural realism with speculative tech, inviting readers to consider how AI could assist or complicate real-world investigations. Thematically, the books grapple with loss, memory, guilt, and the ethics of surveillance, while maintaining a fast-paced cadence that keeps you turning pages. Across the pair, Callaghan crafts a dual narrative of personal grief and professional rigor, delivering vivid crime scenes, sharp dialogue, and a recognisable pair who grow together as they pursue justice. This set is ideal for readers seeking a complete series arc that balances noir atmosphere with thoughtful inquiry into the future of policing.

Book-by-Book Guide:
In The Blink of An Eye — Kat Frank, a capable detective navigating the personal shadows of loss, partners with Lock, an AI detective entity whose logic seems flawless but whose perception of humanity is still learning. The narrative follows a tense inquiry into missing persons that evolves as digital clues and human memory intertwine. As the case deepens, Kat must reconcile her intuition with Lock’s methodical analysis, forcing both to question what makes a lead trustworthy and what price is paid for truth. With each turn, Callaghan balances heart-stopping suspense with reflective moments about grief and resilience, culminating in a revelation that tests the bond between human and machine while delivering a finale that lingers in the mind.
Leave No Trace — In their second outing, Kat and Lock confront a chilling live case after a body is found crucified atop Mount Judd, launching a investigation that pulls them into dangerous territory and a broader warning from the Future Policing Unit. The pair uncover a pattern as more victims surface, each crime steeped in fear and manipulation. The case tests their collaboration under pressure, pushing Kat to navigate dangerous public scrutiny while Lock processes complex human signals. The narrative threads a tense cat-and-mouse dynamic with moral ambiguity, exploring how far society will go to uncover the truth when fear and power collide.

Who This Set Is Perfect For:
This set is tailor-made for adult readers who enjoy contemporary crime fiction with a futuristic edge. If you love tightly plotted thrillers that examine the human cost of policing and the ethical questions around AI, this duo will resonate. It also suits readers seeking a compelling two-book binge that builds a cohesive world and emotional arc. Gift buyers will appreciate the value of owning a complete two-book collection from a rising voice in crime fiction. Teachers and book clubs looking for thought-provoking discussions on technology, memory, and duty will find rich material here. Fans of character-driven suspense, modern police procedurals, and speculative crime will find this set an excellent addition to their shelves.

Key Benefits:

• Complete two-book collection featuring Kat Frank and AI partner Lock
• Engaging blend of traditional policing and near-future technology
• Provocative explorations of grief, trust, and human-machine collaboration
• Bold, page-turning plots with twists that reward careful reading
• Ideal gift set for thriller lovers and new-debut crime fans
• Compact UK paperback editions suitable for gifting and shelf display

About the Author:
Jo Callaghan, the award-winning author behind this set, writes with a sharp eye for contemporary crime and the human impact of advanced technology. A former senior strategist researching AI and genomics’ impact on the workforce, she channels real-world insight into gripping fictional investigations. Callaghan’s debut novel, In The Blink of An Eye, has drawn significant acclaim, including recognition from major awards and literary figures. Her writing harnesses a rare blend of emotional depth and procedural deftness, creating memorable protagonists in Kat Frank and her AI counterpart Lock. Residing in the Midlands, Callaghan brings a grounded perspective to high-concept crime fiction, infusing each scene with authenticity, wit, and compassion that readers return to again and again.

Why You’ll Love This Set:
If you’re building a top-tier crime fiction shelf, this Kat and Lock collection offers a standout pairing: a gripping, timely premise with heart and humanity at its core. Owning the two-book collection gives readers a satisfying narrative arc, a strong sense of place, and a practical, binge-friendly reading experience. The set is especially appealing for fans of police procedurals that don’t shy away from thorny questions about technology’s role in society, and for readers who enjoy a well-constructed duo dynamic that evolves across books. It’s an evocative, addictive pair that strengthens any thriller line-up and proves Jo Callaghan’s smart, empathetic storytelling.

Please Note: The individual books included in this listing will be dispatched as per the original UK ISBN and UK edition cover image shown in the image.