I read through this book cover-to-cover in preparation for the CISSP exam. The 4th edition contains the updated, newly organized The book uses many writers, sometimes multiple per domain which results in disjointed and often repeated (sometimes nearly verbatim) writing. Due to the "Official" nature of the book, it is very dryly written, analogously to a dictionary. Shon Harris (and her nearly entertaining writing style) will be sorely missed. I read her exam guide prior to this one and I now understand why her books were so highly rated. The ISC2 authors make no attempt to provide interesting material and it shows. Another, albeit minor, annoyance with this book is the very limited number of test questions provided. If you study with only this book, you will need to supplement with test questions through another source (once again another place where the Harris version was leaps and bounds ahead).
If you can use this book as a reference and utilize another book as one to read cover-to-cover, I would recommend doing so.