this book represents a stupefying amount of research on nearly all commercially available watercolor pigments. the text begins with an overview of the color wheel (reduced to a color "triangle" anchored on the subtractive color primaries RYB), then marches through the colors in sectional sequence. each section opens with a survey of pigment development and a separate discussion of specific pigments. every pigment from each manufacturer is represented by an identical color swatch footprint, showing a graded wash and a wet-on-wet blossom, keyed to lightfastness tests and the actual pigment ingredients of the paint. the swatch commentaries reveal some clear biases (the same pigment is described as "toxic" or "not lightfast" under one manufacturer but as "a beautiful color" under another), but for a work of this scope the level of accuracy is stunning. it's revealing to finally comprehend how variable a "type of paint" such as hooker's green actually is, the diversity of names for the same pigment (such as phthalo blue), and the sheer abundance of unique pigments available in the blues, yellows and reds. overall a work of tremendous craftsmanship, perseverence and care. essential for any serious watercolor painter.