How to Build a Successful Launch List for a Book

The view course went out to 4200 people, less than the test driven layer one. But refactoring UI went out to 34,000 people. And that's just because it was just like a more compelling topic that appealed to more people. Steve started doing video versions of that sort of thing too. I think he only did like five or six videos total, but even that got him like 30,000 subscribers on YouTube.