I wish someone who had been following this routine for years and is in her 60's or 70's would write a book! I am not discounting these fine ladies who are writing books now, but they are young and believe me, even if you *think* you have wrinkles and skin issues outside of acne, you really do not see aging signs until your 40's and 50's.
I would love to read a book by a woman who has followed this routine for decades and has the face to prove it. This is not a slam against any author or blogger, but in general - even in western skin care, the models are young - I remember back in the 1980's, companies actually had people like Lauren Hutton, who was older then, as their spokesperson for their skincare.