I have been struggling with skincare products and beauty products all my life. Skin is much more complicated than "Oily" or "Dry". In reading The Skin Type Solution, I was able to find my specific skin type (OSPW...Oily, Sensitive, Pigmented, Wrinkle). Now I know exactly what to buy for my skin. What's also helpful is Dr Baumann's website, drbaumann.com, she continues her service by having a forum for readers to share information and a Q & A section where you may even receive an answer from her personally! I think the book is a great investment and the website is a terrific supplement.