The Cybersecurity Companion to IT and OT - Francisco Castillo

IT Security can appear daunting to most when starting, the sheer amount of information, product types, threats and techniques used for hacking leaves one wondering where to start. This book aims to shortcut that complexity and offer in one volume everything one needs to know on how to setup a good Cybersecurity architecture and defences so as to prevent breaches and attacks.

Theory is explained, but emphasis is given as to implement this in a practical manner, so that the reader can take these lessons and apply them immediately.

By distilling a complex subject into its essential building blocks, this book makes advanced concepts accessible without sacrificing rigor. It is an invaluable guide for cybersecurity professionals looking to strengthen their foundations and apply these principles in practice, particularly as AI and technologies continue to reshape the security landscape.

Jikyeong Kang, President and Dean, Asian Institute of Management

A practical and comprehensive guide that bridges the gap between cybersecurity theory and real-world implementation. Covering both IT and OT environments, this book equips security professionals and technology leaders with the knowledge needed to build resilient security programs in an increasingly complex threat landscape.

 Muthukumar Natarajan, Field CTO,  AMEA, Trend AI

IT security has become notoriously difficult to grasp because everything feels like a high-risk emergency. This book changes that. By dissecting security down to its absolute essentials, it gives readers a comprehensive understanding of modern technology, implementation strategies, and the niche realities of IT/OT convergence. Written by a seasoned CIO who has lived through the trenches of tech evolution.

Engr. Jojo Nufable, ECE, CMC, CCISO, EMBA,  Founding Board Director & Internal VP, Cyber Security Council of the Philippines