Take a solid usability concept, slap an acronym on it, wait, then change it slightly and slap a new acronym in it, wait, then slice one piece out of it and give it it's own acronym, wait..lather, rinse, repeat.
Okay, that may be extreme, but that's how this book felt while I was reading it. Solid concepts explained repeatedly under different names. Usability engineering is not easy, but it doesn't need to be artificially inflated either. This book could be half its length and still get all points across just fine.