Here is a link for a free 209+ page pdf download (or you can read online) on Dior from the Met Museum. Pretty interesting and great pics.
https://www.metmuseum.org/art/metpublications/Christian_Dior?Tag=&title=&author=&pt=0&tc=0&dept={70F0A38B-BF1E-45E1-ADBD-2D63B35A714D}&fmt=0

https://www.metmuseum.org/art/metpublications/Christian_Dior?Tag=&title=&author=&pt=0&tc=0&dept={70F0A38B-BF1E-45E1-ADBD-2D63B35A714D}&fmt=0
