"This book is thrilling, important, and deeply fascinating. Cybersecurity is key to modern life: an imperative for us as a nation and each of us personally. It's about protecting our personal data, our businesses, and our democracy. John Carlin has been on the front lines, defending us against attacks from China, North Korea, Russia, Syria, and criminal gangs. The riveting stories of these secret battles for our digital safety teach us much about what America can - and must - do to protect itself." (Walter Isaacson, New York Times best-selling author of Leonardo Da Vinci)

"John Carlin has written a crucial book - for practitioners and laymen alike - about the evolution, impacts, and implications of the abuses we've all witnessed, and many have personally experienced, in the cyber domain. Cyber is yet another example of the dual-edged nature of technology: huge benefit to mankind on one hand, and the potential for great harm on the other. And, unique to this book, is the historical description of how we have tried to respond to the harmful activities that occur all too frequently in the cyber domain. An interesting read, with vivid detail. John represents a superb amalgam of legal insight and great writing skill. A must read in my view." (James Clapper, New York Times best-selling author and former director of national intelligence)