Peak: Secrets from the New Science of Expertise

What this book is, and who it's for

Anders Ericsson's 2016 book is the definitive summary of his thirty-year research career studying experts in chess, music, athletics, medicine, and other domains. The central argument is that extraordinary skill is built through a specific kind of practice — deliberate practice — that almost no one engages in by default, and that the conventional belief in innate talent is wrong in ways that matter for anyone trying to improve at anything. Deliberate practice has four properties (specific goals, focused attention, immediate feedback, working at the edge of current capability) and produces measurable changes in brain structure and mental representations across decades of consistent application. The book is careful about its claims — Ericsson is the researcher behind the famous 10,000-hours framing that Malcolm Gladwell popularized, and he is explicit that the hours alone do not produce expertise; the quality of those hours does. Read this when you've noticed that you've been doing something for years without getting noticeably better at it, or when you suspect that your default approach to skill development is producing repetition rather than improvement.