"EA is one of the three most powerful governance processes that a CXO has to use in implementing change (the others are strategic planning and capital planning)"
This is one of the most important quotes in this book. EA is something strategic, and something strategic is always about a change. This book mention that EA basically just a continuation of QA in 1980s. EA is something that a information dependent company need to strugle now. This book mention that Enterprise Architecture is a complement of System Analyst concept, Strategic Planning and Service Oriented Architecture.
The weakness of this book is and old book (2005), is not based on TOGAF -although explain in the appendix. However in total this is a good book, especially the case study that the author describe in the beginning and used through the book.
Basically all frameworks and concept is the same, this include Enterprise Architecture. For example, it is the same with PMBOK which consist of process, domain (knowledge area, technique), deliverables (input output), tools, management (capability).