This book is about the psychology of modern web apps and how we get people "hooked" to the apps and websites. It goes into detail about the steps required to get people invested in the product they are using and how to maintain that investment.
This book is a fairy tale about mice and labyrinths. The characters of Max, Big, and Zed are musing on the fact that the mice are all in the maze and looking for cheese when there is no one asking why the cheese is always being moved around.
Everyone work in sales. Everyone does sales daily. Learn to become skilled in sales and reap the benefits.