404: Justice Not Found is a thriller novel by Preethi, published in 2026. The story follows Arjun Dev, a man carrying the weight of his sister's death, who discovers that an AI-driven mental health application is secretly profiling users' emotional data. When the algorithm's decisions begin determining who lives and who faces harm, Arjun decides to fight back, joined by ACP Preeti Rao, an…
404: Justice Not Found is a thriller novel by Preethi, published in 2026 by Jump2Learn Publication. The book is for readers interested in fiction that explores the intersection of technology, privacy, and justice, particularly around AI-driven mental health applications and data profiling.
The story follows Arjun Dev, a man still grieving his sister's death ten years earlier, who discovers that an algorithm used by a mental health app is secretly categorizing users based on their emotional data. When that classification leads to real-world harm, Arjun refuses to accept the official explanation and begins investigating, joined by ACP Preeti Rao, an officer who has long worked in the gap between law and justice.
The foreword explains that the technology in the book is based on real practices, including emotional pattern profiling by apps like Wysa, iCall, and YourDOST, and documented cases of shadow data channels in consumer software. The author notes that the idea of an algorithm built for one purpose being repurposed for another is not science fiction but a design decision made by people who believed they would not be caught.
The contents list shows the book is structured with chapters including 'The Penthouse Murder,' 'The Eight Minutes,' 'Class C,' 'Paper Trail,' 'Rootkit,' 'The Pen Drive,' 'No Exit,' 'Red Class Index,' 'Upload,' and '404.' Interludes provide perspectives from characters like Dr. Iyer, Dr. Priya, and Aryan and Anjana. The prologue is set in Chennai in October 2016, introducing Ananya, Arjun's sister, during a therapy session with Dr. Priya Swaminathan.
The author, Preethi, is a Chennai-based writer who has published two earlier works of psychological fiction: 'The Unquenchable Paranoia' and 'The Unlatched Guile.' She spent months researching AI profiling systems, data monetization in mental health technology, and institutional whistleblowing before writing this novel. The book is dedicated to Ananya and to everyone who was right about something that mattered at exactly the wrong moment.