It's a wonderful book in many ways, but color separation went out in the 80's. I started my career doing it, and I have never missed the process. It was such a guessing game, and nothing ever came out exactly as one hoped it would. On top of having to separate the colors, we also had to use only two or three colors (limited color). That's why so many of the older books are in black with only one or two other colors. Only the most famous artists got to use full color. When it became cheaper to print full color in the eighties, color separation went the way of the dodo. That's one extinction I'm not regretting.
Diane