There are not many images in the Chess and the Art of Enterprise Architecture book. But the type of paper and the size of the book make some of them only borderline readable. Some people have reported trouble reading them, especially those that appear in the appendices. The book can be understood perfectly well without them, but I’ve made high resolution versions (infinite resolution even: they are vector PDFs) of the images that are used available to make sure that people who want all the details also get them. See the book’s home page for details.
PS. I’ll be speaking at Gartner’s EA Summit 2015 London UK on May 2oth and at the MBT Congres in Houten NL on May 21 about Chess and the Art of Enterprise Architecture.