Color Design Workbook is an introduction to colour theory, colour design and the emotional impact of colour which is about 1/2 information and 1/2 case studies supported by commentary. As such, it goes significantly further than most introductory guides in terms of what colour does and how to work with it. It also has a wealth of cutaway boxes giving additional snippets of information that are highly useful if you never happened to pick them up on the way. Overall, this is the best introductory book on colour I've seen, although it falls short of technical assessments of colour management in the digital world.
There are many books on colour, and even more general design books with a section on colour. This one covers all the basics -- additive and subtractive colour, colour theory and sample colour combinations -- but it goes beyond most of the books by giving a guide to emotional impact (although this covers only nine colours -- Black, White, Gray, Green, Purple, Orange, Red, Yellow, Blue) and compositional principles which apply specifically to colour design. It also covers the most important colour illusions, such as after-imaging.
Memorising everything in this book will not make you an expert on any particular part of colour design, but it will definitely give you a much broader understanding of all the issues in colour design than any other comparable book. To go much deeper, you will really need to go to specialist works on the particular areas of your interest.
Mercifully, less than half of this book is given over to case studies. Although case studies are always interesting and have an illustrative value, they don't have the same unique value in the internet-enabled world that they did in the 90s when it was hard to get hold of samples from lesser known brands.
Overall, this is a very attractively designed book which has a great deal to offer.
Warmly recommended.