Every search leaves a trace. The Quiet Investigator by Mark Bentley is the essential guide to good operational security, tradecraft and best practice in online investigations. Every time you research a person, an account or a group online, you leave footprints. This book shows investigators how to keep those footprints out of sight, protect themselves and their cases, and still gather intelligence that holds up. Inside, Mark introduces his ABC pivot (Acquire, Back up, Corroborate) for turning online data into actionable, defensible intelligence. Written by an investigator of 38 years and the author of The Essential Cyber Investigator's Handbook. Paperback, 6 × 9 in. Published by Tracetools Ltd. ISBN 978-1-0684638-2-2. Publication date: 1 December 2026. Pre-order now; copies ship from publication.

Want both books? Get The Essential Cyber Investigator's Handbook and The Quiet Investigator together for £45 plus postage (save £20): buy the two-book bundle.