You can easily read Atomic Habits (not an affiliate link) by James Clear in a week. It is only 264 pages. Besides, it is written well and presents a few simple concepts. The stories Clear uses to open each chapter and illustrate the principles keep your interest in reading.
What Clear proposes are small changes you can implement in your daily routine so that you can change your habits and results over time. Also, the goal is to have lasting results. Continue reading