Book excerpt: Tom Mohr's book, Scaling the Revenue Engine, has already garnered over 12,000 online readers. This is the book author Geoffrey Moore (Crossing the Chasm) has challenged execs to read (You really want to read this...). Same with Tien Tzuo, the CEO of Zuora (...read this book). So too with Victor Ho, CEO of FiveStars (...the most complete resource on driving real growth I've ever seen.). And many more. In Scaling the Revenue Engine, the revenue engine is seen as a whole system, bounded by unit economics. It stretches beyond marketing and sales to also incorporate product, technology, and even accounting. At every stage of revenue engine growth, you uplift maturity by leveraging your deployment of people, tools, workflows and metrics-- always working outward from a clear understanding of customer value.