25 Rules for Product Managers based on years of building products and learning from the masters like Marty Cagan, Jana Eggers, Seth Godin, Jeff Patton, Steve Blank, Eric Ries, Mark Hurst, Phil Terry, Steve Johnson, and my peers and colleagues along the way. Influenced and inspired by Pragmatic Marketing, Customer Driven Development, Minimum Viable Product, Lean Startup, and the School of Hard Knocks.