Richard A. Clarke and Robert K. Knake provide a detailed rundown of the evolution and legislative history of cyberspace. The two leading cybersecurity experts encourage innovative cyber policy solutions to mitigate cyberwar, protect our critical infrastructure and help citizens to prevent cybercrime.

The Fifth Domain, commonly referred to as cyberspace, poses new challenges for governments, companies and citizens. Clarke and Knake discuss the historic milestones that led to modern cybersecurity and cyber policy. With detailed accounts of how governments implement security layers in cyberspace, gripping examples of breaches of cybersecurity and innovative solutions for policymakers, this book ended up rather dense in content – a positive signal for someone interested in cybersecurity, but fairly heavy for everybody else. Some of the content widely circulated the news media, other content is intriguing and through-provoking. While the policy solutions in this book aren’t ground-breaking, the authors provide fuel for policymakers and the public to take action on securing data, but, perhaps more importantly, to start developing transparent, effective cyber policies that account for the new, emerging technologies within machine learning and quantum computing. Personally, I found the hardcover edition too clunky and expensive. Six parts over 298 pages, however, made reading this book a breeze.