How to Build a List?

The Laravel course had 6400 people on launch day. And that had a 64% open rate. I probably sent out like six or seven sort of update emails. Each one would either have like a screen cast in it, a free chapter from the book. Give away a lot. It's fine. Because they were planning to buy it anyways,. So it's just like they're getting it early, you know? Yeah. People will buy books that are just like a collection of blog posts from somebody 100% that are all of Derek Sivers books are on his website and he bought 10 copies of each one hard covers.