Educational, not professional advice

Every ZenTesto book is educational. None of them is legal, financial, medical or tax advice for your situation, and reading one does not create a professional relationship with the author or the publisher.

Decisions stay yours

The books describe methods and experience. Applying them is your decision, and the result depends on facts the author cannot know: your market, your obligations, your circumstances.

Where to get qualified advice

For anything with legal, medical or tax consequences, consult a licensed professional in your jurisdiction before you act. If a book touches your health or your money, that advice comes first and the book comes second.

No guarantee of results

We do not promise that following a book produces a particular business, financial or personal outcome, and we are not liable for losses arising from decisions you take after reading it.

References to other companies

Books may reference other companies, tools or research. Those references are not endorsements, and a tool described in a 2026 edition may have changed since.

Last updated

4 November 2026