James Clear writes in a modular style. Each chapter builds on the last, but the 4 Laws are distinct enough that you can re-read specific sections. With an EPUB, you can ctrl+F (search) to find “how to stop procrastinating” in seconds—impossible with a physical book.

Your habits are how you embody your identity. Every action you take is a vote for the type of person you wish to become. You cannot rely on motivation; you must rely on evidence. As the votes build up, so does the proof of your new identity.