Layers: The Complete Guide to Photoshop's Most Powerful Feature was written because the author wished that there had been a book specifically on layers when he was first learning Photoshop. Everyone knows that layers exist, and most people use layers to one extent or another, but few really understand its full potential. Yet understanding layers is one of the keys to understanding Photoshop. This book will show you exactly what you can do with layers, and how to do it. The Complete Guide to Photoshop's Most Powerful Feature: Layers is 312 pages in length and is contained in ten chapters.
Chapter One, "Layer Basics," explains the basics of layers. But even if you are familiar with layers, you will still want to read much of this chapter because there are quite a number of techniques that are shown here that you may not know exist. This is divided in to the true basics, the use of multiple layers and stacking, and another lesson that has a ton of tips and tricks that you don't want to miss.
Chapter Two, "Blending Layers," lets you take layers even further by showing you how to mix layers together. By using the techniques illustrated here you can go beyond simply manipulating the opacity and really start learning about blending. The author's goal is not to show you every single item with regard to blending, but rather show you only the ones that you need to know about to get the job done. Here he works with the three most important techniques for layer blending.
Chapter Three, "Adjustment Layers," shows that there are other layers available beyond the regular layers that you have been working with thus far. This is a different type of layer in the way that it lets you edit images nondestructively. It even lets you apply selective adjustments to specific parts of your image.
Chapter Four, "Layer Masks," continues a technique that you learned in chapter three when making adjustments. Layer masks let you nondestructively erase areas away from one layer to reveal the layers below. An adjustment layer automatically includes a layer mask, but a regular layer does not so here you will learn how to add a layer mask to a regular layer.