Knapp and the Google Ventures team took an ordinary frustration, meetings that go in circles and decide nothing, and turned it into a tight five-day process. Small team, one hard problem, a real prototype and real users by Friday.

The clever part is the discipline it forces on you, not the calendar. You map the problem, sketch, decide, build a rough façade of the idea, then put it in front of five people. By the end of the week you have evidence instead of opinions.

I’ve run it both ways, the full week and a squeezed two-day version, mostly to get business and engineering in the same room and force a real decision before anyone has spent a quarter building the wrong thing. It’s one of the most practical books I own. Less theory, more “do this on Monday morning.”