I've recommended Steve Blank's "The Four Steps to the Epiphany" several times but I didn't know that the blog author has published Running Lean, a (PDF) book on

I've recommended Steve Blank's "The Four Steps to the Epiphany" several times but I didn't know that the blog author has published Running Lean, a (PDF) book on customer development just for web startups. I'm going to order it right now. Thanks for posting this.