Skip to Content
Lessons from the Frontlines
book

Lessons from the Frontlines

by Assaf Keren
January 2026
Beginner to intermediate
272 pages
5h 4m
English
Wiley
Content preview from Lessons from the Frontlines

Introduction

If you picked up this book thinking that security leadership is primarily a technical role, I’m going to challenge that assumption from the very first page.

Yes, you need to understand technology, threats, and controls. But after 25 years in cybersecurity—from military intelligence to Fortune 500 CISO roles—I can tell you that the leaders who thrive aren’t necessarily the most technically brilliant. They’re the ones who’ve learned to navigate the complex human side of security work.

They know how to build curiosity-driven teams that adapt to constant change. They’ve developed the grit to recover from inevitable failures and the optimism to inspire others during crisis. They execute without waiting for permission, embrace change as opportunity, and speak the language of other business leaders. Most importantly, they understand that security work is fundamentally about people—protecting them, enabling them, and working through them to create more secure organizations.

This book isn’t a collection of theoretical frameworks or generic leadership advice. It’s built from real experiences, honest failures, and hard-won lessons from the frontlines of cybersecurity leadership. Every story I share, every mistake I admit to, every framework I present has been tested in the reality of high-pressure security environments.

Why These Lessons Matter Now

Whether you’re already in a security leadership role or aspiring to one, you’re operating in a field that’s changing faster ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Communicate with Teams More Effectively

Communicate with Teams More Effectively

Charles Humble
What Successful Project Managers Do

What Successful Project Managers Do

W. Scott Cameron, Jeffrey S. Russell, Edward J. Hoffman, Alexander Laufer
The Hidden Cost of AI-Assisted Creativity

The Hidden Cost of AI-Assisted Creativity

Léonard Boussioux, Anil Doshi, Oliver Hauser, Kartik Hosanagar
How to Develop a Great Digital Strategy

How to Develop a Great Digital Strategy

Jeanne W. Ross, Cynthia M. Beath, Ina M. Sebastian

Publisher Resources

ISBN: 9781394395385