There is certainly value in concepts of defining use cases with enough specificity and brevity. Unfortunately, this is one of those books where the authors are so enamored with their cleverness, the treatment suffers. For example, they offer a section on “graphical icons to highlight goal levels.” To quote from the book:

”Very summary (very white) use cases get a cloud, [cloud icon]. Use this on that rarest of occasions when you see that the steps in the use case are themselves white goals.”

and:

”Some subfunctions (black) should never be written. Use a clam, [clam icon], to mark a use case that needs to be merged with its calling use case.”

They seem to assume familiarity with UML. Overall, the presentation was too dry for me.