David Nugent 
Zero Sales [EPUB ebook] 
Generating Services Revenue Without Selling

I created the Zero Sales Theory to both demystify the complex nature of revenue generation and create an understandable process that has proven very successful for me, in the hope that it would empower others. I hope to also shine a light on a "business art" that is often looked down upon by those who still subscribe to the idea of old-school sales and cheesy salespeople. Generating revenue requires a certain kind of practical intelligence that includes a nuanced set of skills honed over time but never perfected. It is the foundation of all business and creates happiness and security for millions of people.