I teach color theory in a major design school in California, and I have been eager to find a good source of decade by decade palette information for the 20th century. I am sad to say that this isn't that book. It is written from a fashion point of view, with grand sounding pronouncements about arbitrarily chosen artifacts. And, it is a Pantone book, so its primary purpose is to promote Pantone (A system invented in 1963, two thirds of the way through the 20th century), rather than provide insight into why certain hue combinations became popular. There is some visual entertainment to be found here, to be sure, but overall this is a lost opportunity.