About the author
Real preparation. Calm under pressure. Practical systems.
I am Marius Andronie, a retired Army engineer from Transylvania. I spent decades keeping complex systems running under pressure. Today I write the books I wish people had when life gets hard.
Short bio
Marius Andronie is a former Romanian Army officer, a graduate of the Military Technical Academy in Bucharest, who then spent twenty years typesetting scientific and mathematical books for academic publishers. He lives near Deva, in Transylvania, in a home that runs close to off-grid on solar power, batteries and a heat pump.
He writes short, practical workbooks for real problems: getting a household ready for outages, managing money on one income, budgeting by biblical principles, gratitude and CBT practice in later life, and grief after losing a pet. Each book is a structured system you can follow one day at a time, without fluff.
He also builds AI software through his company, Devaland.
From the field to the page
My years in the Army taught me one truth: real survival is not about fear, it is about wise preparation, an open mind, and smart systems. Whether securing supply lines, managing critical infrastructure, or operating in high-stakes environments, I learned how to stay calm under pressure, solve complex problems, and keep things running, no matter the conditions.
I now apply that same engineer's mindset to the challenges ordinary people actually face: money stress, anxiety, grief, and an uncertain world. My books are not theory. They are step-by-step systems, built with the same clarity, structure, and reliability I relied on in the field, and grounded in real science.
That same systems thinking also powers the project I am proudest of today: Deal OS, an AI due-diligence platform I build for people buying businesses. Different field, same belief, understand the system, and you command the outcome.
The mission goes beyond any single topic. Whether you are rebuilding your finances on one income, healing after losing a pet, calming a restless mind in ninety days, or learning to live more self-reliantly without moving to the woods, the goal is the same: turn a hard moment into a workable plan, one small system at a time.
Because true independence is not about escaping the world. It is about mastering it.
Featured: read an author interview with Marius on Awesome Gang.
What I write about
Practical books across five worlds
Resilience & self-reliance
Off-grid power, water, food, and security for ordinary families, no bunker required.
Money & faith
Financial freedom on one income, debt, and biblical money principles without guilt.
Mind & wellness
Gratitude and CBT systems that rewire your outlook in minutes a day.
Pets & grief
Gentle, guided workbooks for healing after the loss of a beloved pet.
After My Pet's Passing (cats) · After My Pet's Passing (dogs) · The Confident Pet Parent
Family & home
Calm, low-stress planning for homeschooling and family life.
Frequently asked questions
Who is Marius Andronie?
Marius Andronie is a former Romanian Army officer from Transylvania, a graduate of the Military Technical Academy in Bucharest, who then spent twenty years typesetting scientific and mathematical books for academic publishers. Today he writes short, practical self-help workbooks and builds AI software through his company, Devaland. He lives near Deva, in a home that runs close to off-grid on solar power, batteries and a heat pump.
What does Marius Andronie write about?
Practical, step-by-step books in five areas: resilience and off-grid self-reliance, money on one income and biblical money principles, gratitude and CBT practice for mental wellness, grief after losing a pet, and calm homeschool planning. He also writes technical books on putting AI systems to work, such as Agents You Can Leave Alone and Giving an AI a Job.
Where can I buy his books?
Mainly on Amazon and Leanpub, with some titles in other ebook stores too. Every title and every store is listed on the Read anywhere page, and the full library by topic is on the Books page.
How can I contact Marius?
By email, for reader questions, speaking, collaboration or media inquiries. The address and the Reader Circle sign-up are on the Contact page.