“Rob Sheppard has produced a book on using Adobe Camera Raw (ACR) that always keeps in mind that the purpose of ACR is to help the photographer produce an image that embodies his vision. There are several books available about using ACR that describe how to use the sliders and what the effects are. Sheppard's book covers the same ground, but he also relates the technique to the artistic purpose. For example, he tells you how the shadows slider works to change the black point in a picture. But he tells you that you should not just extend it to some arbitrary limit that insures the image has the greatest range. He discusses the fact that varying the black point helps to give snap to some pictures and that increasing areas with no shadow detail may actually help to achieve the photographer's vision.”