Atomic Habits provides a step-by-step plan for building better habits for a lifetime by making tiny improvements over time.

These tiny improvements may seem insignificant when they are implemented but result in big changes over time.

The author opens this book with the gripping account of being struck in the face with a baseball bat in high school, his slow recovery and his revelation and dramatic change in his life due to the tiny habits he discovered.

James Clear bases his observations and recommendations on the fields of biology, neuroscience, psychology and more.

One of the key concepts in the book is the idea of the Habit Loop.  All habits proceed through these four stages in the same order forming a loop.