URL: https://www.pretotyping.org I can't recall when I first read this book, but it changed how I think about product development. Maybe in the future, I will add more details to this description, but for now, the takeaway is: - Is there a quick and cheap way you can test out a theory? - Pretotyping is ways before then prototyping. Pretotype: no pruduct. Prototype: Minimal Viable Product