Felix Lenhard — Business Builder // Author // Subtract to Ship
Felix Lenhard — Business Builder // Author // Subtract to Ship
For founders
Most business books tell you to do more. These tell you the opposite: the fastest way to build something real is to remove everything that doesn't matter. Four books, one phase each. The operating system behind 20+ years of building products, companies and startup ecosystems.
Extension · Out now
The MedTech Founder's Regulatory Playbook, with Tibor Zechmeister
How to certify a medical device in three to six months instead of three years. Written with a Notified Body Lead Auditor and founder of four MedTech companies. Out now on Amazon.
Get it on AmazonExtension · In production
with Giampiero Sirianni
The eCommerce operator's expansion playbook, written with an operator who spent twenty years integrating eCommerce, production and logistics across dozens of countries.
Book 1 · In production · 2026
How to find, test and validate a business idea before you spend a euro. Real demand versus an idea that only feels exciting in your head.
Book 2 · In production · 2026
Ship the minimum viable experience your first customers actually want. Build versus buy, pricing courage, sales pages, systems that let you ship without burning out.
Book 3 · In production · 2026
Predictable revenue without becoming your company's only salesperson. Content engines, lead generation, email, pricing psychology, word of mouth.
Book 4 · In production · 2026
A business that doesn't need you. SOPs, hiring, financial dashboards, recurring revenue, and the decision to stay small, grow or sell.
The case study · both volumes out
The same method applied to a craft. Two volumes, 72 chapters, built on 32 foundational texts. 5.0 average on Amazon. Both volumes out.
Volume 1
Ancient Lessons in Mastery for Modern Beginners
How adults actually learn: deliberate practice, results over reps, and why an analytical mind is an asset. The cognitive science of attention, memory and perception. An honest account of starting from zero.
Get it on Amazon
Volume 2
Ancient Lessons in Meaning for Modern Performers
For anyone who got good at something and then asked whether that is all. Six principles from an ancient discipline, the philosophy of wonder, and the line between entertaining and manipulating.
Get it on AmazonWhat readers say
It quickly went from being a book that would help me improve at magic to a book that will help me improve at everything.
I've been a professional magician for 27 years and it made me think and reassess both my business and performance.