I am working on my first photo book and decided that I need to learn the more advanced techniques of photo editing so I can do it myself rather than outsourcing it. I am familiar with PS3 to a good degree (haven't bought PS4 yet. saving for a new laptop). I can do moderate retouching, but I am looking to learn more of the advanced techniques that are subtle touchups. I found an image on SugarDigital.com under retouching, Commercial, Current, third image down (Patagonia ad of a woman on a mountain) that is the kind of work I am trying to learn. You can see a before and after on her. I know that some of this is comping rather than retouching if you make a distinction. I am not looking for an answer like "google it". I'm not lazy, I have looked and most of the ones I have found on google are how to change hair color or clone out moles. I know how to do that. What I am looking for is a series of tutorials online (preferably) or a book that can teach me these techniques. I have looked at some of Kelby's work but the video tuts I saw were more landscape work and I am looking for more commercial and to a lesser extent editorial. Thanks.