Praise & endorsements
What people are saying
Endorsements gathered from cybersecurity professionals and Bitcoiners. Full text below; the homepage card row carries pull-quotes for those who delivered longer pieces.

Luke approaches Bitcoin the way I approach malware. He wants to understand how it actually works, where it is strong, and where it can be broken. This book applies that thinking to Bitcoin, and I have not seen it done before.
MIKKO HYPPÖNENFrom the foreword · Author, If It's Smart, It's Vulnerable · Global Cybersecurity Expert
Bitcoin changes how we think about security, and Luke bridges that gap with clarity and precision. This is the cybersecurity book Bitcoin has been waiting for. If you care about protecting what matters in a digital world, this is essential reading.
JEFF BOOTHAuthor, The Price of Tomorrow · Technology Visionary
Defending Bitcoin is a masterful exploration of the critical intersection between cybersecurity and the future of money, providing practical, industrial-grade strategies to safeguard Bitcoin against sophisticated threats in an increasingly hostile digital landscape. Luke de Wolf's deep expertise makes this an indispensable resource for builders, holders, and defenders of this once in a lifetime monetary revolution.
TONY YAZBECKCEO, The Bitcoin Way · Senior Cybersecurity Professional
A Bitcoin book that goes above and beyond the usual, Defending Bitcoin gives the reader an actionable overview on how to use Bitcoin securely and privately. In Defending Bitcoin, Luke analyzes the risk profile of the network as a whole, but really dives deep into how individuals can reduce their own risk profiles when using it.
LYN ALDENAuthor, Broken Money · Former Systems Engineer
Every Bitcoiner needs to read this book. Luke lays out the security fundamentals too many of us skip past until it's too late, and he does it without dumbing them down. I've seen firsthand how quickly things can go wrong, and I've shared my story so others don't have to learn the same lesson the hard way. Read it before you need it.
LAWRENCE LEPARDAuthor, The Big Print · Macro Investor
Every modern state is a printing press wired to a surveillance system, and Bitcoin is a knife pointed at both. That is why the people who run the press and read the wires will spend the rest of their institutional lives trying to disable the knife, and why exchanges, identity gates, chain surveillance firms, and the agencies that license them exist in the shape they do. Holding your own keys, running your own node, and refusing to be identified are how the knife stays sharp. Inflation is the slow confiscation, seizure is the fast one, and the legal architecture around both was built to make the theft feel like governance. The state has spent a century learning to take what is yours and call it law; getting any of it back starts with the recognition that no one outside your own household is coming to help. Thanks to Luke for writing the field manual the rest of us were going to have to assemble from scratch. Read it, work the chapters, and pass it on.
MAX HILLEBRANDAuthor, The Praxeology of Privacy · Cypherpunk