Books
Three books on the work and the life behind it.
Two bestsellers — one on the leadership ceiling that breaks high-IQ technical teams, one a memoir on presence and life in the micro — and a definitive playbook (in progress) on medical device cybersecurity from premarket submission through postmarket surveillance.
Coming 2026, in progress
Medical Device Cybersecurity. The Book.
Navigating Premarket Submissions and Postmarket Surveillance
A complete, working playbook for the teams responsible for shipping safe, secure medical devices. Eleven chapters span the Total Product Lifecycle: regulatory landscape, risk management, Secure Product Development Frameworks (SPDF), security architecture views, interoperability, STRIDE threat modeling, third-party software and SOUP analysis, cybersecurity testing, and structured risk assessment. Every chapter closes with useful tips, key terms, and a real case study from the field.
What's inside
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Threat modeling, STRIDE & SBOMs
Trust boundary analysis, entry point analysis, and threat scenario development, with a worked STRIDE case study.
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Risk management & TPLC
Building a cybersecurity risk management report that holds up across the Total Product Lifecycle, premarket through postmarket.
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Secure Product Development (SPDF)
FDA-aligned development, security architecture views, and design controls that actually clear submission.
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Third-party software & SOUP
Managing components, Software of Unknown Provenance, and SBOMs with a SOUP case study in medical imaging.
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Global regulatory alignment
FDA, EU MDR, PMDA (Japan), NMPA (China), TGA (Australia), plus NIST, AAMI, and IEC standards mapped to one program.
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Real case studies
Philips Tasy EMR (2018), SaMD 510(k), wearable health monitoring, and remote patient monitoring testing.
Bestseller
The Smartest Person in the Room.
The Root Cause and New Solution for Cybersecurity
Opens with Dick Cheney disabling the wireless on his pacemaker because he feared assassination by hack, and uses that image to argue the root cause of the cybersecurity war is not technology, but the people defending us and the smartest-person-in-the-room ego that keeps them from communicating. Drawn from thirty years in the field and the founding of Alpine Security, the book lays out a seven-step Secure Methodology that turns brilliant individual contributors into leaders who can actually be heard.
What's inside
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01 · Awareness
Notice the habits, stories, and reactions quietly running the room before anything else can change.
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02 · Mindset
Trade ego, posture, and fear of ambiguity for curiosity, ownership, and a growth orientation.
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03 · Acknowledgment
Confirm what was actually heard before replying. The handshake most technical conversations skip.
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04 · Communication
Translate technical depth into language a non-technical executive can act on, without dumbing it down.
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05 · Monotasking
Presence is your ally, distraction is your enemy. Run the conversation in front of you, fully.
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06 · Empathy
Cognitive empathy as the unlock for high-trust technical teams, even for engineers who think it is fluff.
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07 · Kaizen
Compound improvement through honest self-review, retros, and small reps that beat heroic overhauls.
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Growth & contribution
The closing chapter on what happens after the seven steps: leading other smart people through the same arc.
Bestseller · Memoir · 2023
The In-Between.
Life in the Micro
Opens with a chain-reaction car accident on May 9, 2022, where Christian and his partner Vanessa stop to help and everything snaps into focus. From that in-between moment, the book traces a path out of a macro-obsessed life of summits, exits, and chase, into a present-moment way of leading and living. Ten chapters move from rock-bottom to actionable awareness, identity, intention, authenticity, core-value alignment, presence, insight, leadership, and the in-between in action.
What's inside
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Rock-bottom & awareness
The Danish breakdown and the slow turn from macro-chasing to actionable awareness of what is happening right now.
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Resetting identity & intention
Trading a chase-defined self for informed intentions, authenticity, and a way of choosing that holds under pressure.
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Core value alignment
Surfacing the values quietly running the show and re-aligning work, relationships, and ambition around them.
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Presence & insight
The micro-moment practice that turns presence into insight, and insight into better decisions at scale.
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Leadership from the in-between
What it looks like to lead a company, a team, and a partnership from the present moment rather than the next milestone.
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The in-between in action
Field stories from the car crash, climbs, business exits, and partnership where the micro-practice actually got used.
Reader reviews · The Smartest Person in the Room
What readers are saying about TSPITR.
‘Open communication allows us to solve problems and commit to fixing them’
"Christian Espinosa's insightful book shares his experience and knowledge about dealing with hacking and how to prevent it. His Secure Methodology includes seven steps: Awareness, Mindset, Acknowledgement, Communication, Monotasking, Empathy, and Kaizen. This is an indispensable guide for understanding cybersecurity's human element and developing effective communication within technical teams."
Informational, but most relevant for cybersecurity employers/employees
"Espinosa’s book delves into why cybersecurity is not as effective as it should be, focusing on employee mindsets and communication skills. While it could benefit a wider audience, the book is particularly useful for cybersecurity professionals looking to improve team dynamics and reduce errors stemming from ego and overconfidence."
The most important thing in cybersecurity [and self]
"Eclectic and insightful, this book emphasizes that intelligent communication is crucial in cybersecurity. It challenges tech employees to develop soft skills and a growth mindset to foster teamwork. This is a valuable read not only for those in cybersecurity but for anyone striving to improve their professional interactions."
Author knows what he is talking about.
"Espinosa’s book is a practical guide that discusses both cybersecurity and the soft skills that are essential for success in the field. It is written clearly and provides actionable insights for technical professionals to cultivate better communication and team dynamics."
Do You Have an Appetite for Change and Growth? Then This Book is for You!
"Espinosa’s Seven Step Secure Methodology focuses on closing the gap through human connection. This book is essential for anyone looking to improve their communication and people skills in the tech industry. It thoughtfully challenges readers to reevaluate their personal and professional interactions."
Reader reviews · The In-Between
What readers are saying about The In-Between.
Amazing Read!
"This book is a journey of self-exploration that truly resonates. It encourages reflection on life’s moments, making us appreciate the beauty of the present more."
Thought-Provoking
"Christian Espinosa's storytelling is both engaging and thought-provoking, reminding us of life's in-between moments that often go unnoticed."
A Must-Read!
"I love this book. It changed my perspective on things so much. I wholeheartedly recommend it to anyone seeking personal growth."
Good Insights
"While some parts felt redundant, the insights about being present in the 'micro' moments are powerful and truly impactful."
Inspiring Life Lessons
"This book is a beautiful exploration of life through micro-moments, encouraging readers to pause and appreciate the little things."
Bulk orders and speaking