The Cold Start ProblemFrom Airbnb to Uber, a revelatory exploration of how hidden networks can turbo charge businesses from one of Silicon Valley's best respected investors. 'A true Silicon Valley insider' Wired Why do some products take off? And what can we learn from them? The hardest part of launching a product is getting started. When you have just an idea and a handful of customers, growth can feel impossible. This is the cold start problem. Now, one of Silicon