Book change for the better. . It is a book that contains a summary of the most important 21 books in the world regarding self-development and self-improvement. Each chapter in the book addresses an aspect of personality, with the aim of keeping pace with life changes and acquiring the habits of the most successful personalities around the world. This book is for everyone: . He wastes his time without realizing it. He repeats his mistakes and expects different results. He wants to understand his personality to make it better. Frustrated with many choices