Hi, I was just wondering if anyone knows which are the most common skin types? I know this will probably depend on the country - in the book apparently ORNW is the most common type for British Caucasians and thus products marketed in England are geared towards this type of skin - which is probably why as a OSNW I ran into so many problems with "wonder" products containing glycolic acid, DMAE, alpha lipoic acid and vitamin C. These type of products tore my skin to shreds and yet I persisted in buying them over and over, seduced by the marketing hype and friends insisting that they worked for them. This book should be on the secondary school curriculum as if I knew at 15 what I know now maybe I wouldn't have such red, open pored, broken veined, spotty skin. I could weep at the injustice of it. I have been following the rules for 6 weeks now and am seeing such improvements in oiliness and redness - I would never before have used such simple products fearing that there would not be enough "actives" in them to be successful - I thought that because I had problem skin I needed "hardcore" products - now I know that it was the products that were causing the problem - specifically exfoliators to which I was addicted. My routine now could not be simpler - Intral Dermal creamy cleanser, Vichy water, Clientele firming serum, Clientele Age Blocker SPF 25 daytime and Prescriptives Flight Cream at night. Everything is creamy and my skin is plumper, more youthful, less spotty and red day by day. I am extremely grateful to Dr Baumann for enlightening me - it is interesting to see that in the UK this book has not been promoted by beauty editors of magazines - the beauty industry does not want the buying population to read this book - it thrives on people with difficult skin types aiming to achieve skin nirvana by purchasing every new product which launches in the hope that this will be "the one". We are all empowered now with knowledge for our own skin types - marketing hype can no longer touch us. I am so thankful that I found this book whilst browsing in my local Borders. It should be in the window and on every gondala end in every book shop and beauty store.