David Heinemeier Hansson's review of Are Your Lights On?: How to Figure Out What the Problem Really Is

Are Your Lights On?: This isn’t technically a programming book, but it deals with the biggest problem facing developers none the less: What is the problem we’re trying to solve? Is it the right problem? Could we solve a different problem instead and that would be just as good? Nothing has increased my programming productivity more than being able to restate hard problems as simple ones.

Ref: https://signalvnoise.com/posts/3375-the-five-programming-books-that-meant-most-to-me