I like this book better then American Corporate Identity 2002. I think it offers more - it is not only bigger but seams to be more diverse, which I suppose contradicts a bit to the title.
It has an index over clients and design firms at the end, other then that the whole book is full of designs.
Looking at the inside I think it offers more complete graphic solutions, it has very little text about the design; just who has done it and for whom (therefor I rate it 4 out of 5, instead of 5, some would... more info