This book is a revised and extended version of the article that I wrote and published in 1996, 22 years ago now, which for some time I have felt the need to update. Some parts of the text have been modified, others removed and others extended, all as a result of the maturity that I have gained after all these years of experience. I have of course also changed some of my own pictures which were the result of a surprising and naive confidence in myself. Some of the original images from my old edition of the Modulor have been retained, I suppose out of pure nostalgia and a love for one's own books, despite the fact that they could have been replaced by others that were better scanned than the originals produced with an old hand-held scanner... and others have been removed.I believe that this evolved version of the original article will be worthy of greater recognition from the large number of people from around the world who have been and are kind enough to read it.Manuel Franco, A Coruña, April 2018