1. Is the book for you? You are pretty much the exact target audience The reason I personally like doing these "Practical Projects" books, this being my second (with a third starting soon), aside from the fact that I suspect it's more fun doing these than a straight "textbook"-ish book, is that I believe most developers get more out of them. I know for me, it's one thing to see a simplistic, contrived example of something, in the early stages of learning that's probably fine, but as you get just a little familiar with something, I think seeing more full-blown applications that are well-documented and described in detail is much more useful. Seeing how other developers solved certain problems, seeing how they approached certain things, is far more useful. Unfortunately, while there's tons of the simplistic, contrived examples floating around the net, and while you can certainly get full-blown source code to examine, you rarely, in my experience, find full applications that are well-documented and written with learning in mind. That's where I think books like mine are really worth a lot. This book especially is written assuming you have some experience already, there's not quite as much "get up to speed"-type chapters early on (my first book specifically on AJAX had a little bit more of that), so yeah, as you describe yourself, I suspect my book would be a good fit for you. Now, only you can decide if it interests you, and if you think you'll get anything out of it, which leads me to your next two questions...
Not only is the full TOC there, but so is a sample chapter (one of the more entertaining and yet educational I feel).
3. Can it be read by bouncing around? For the most part, yes. I think you would be well-served to read the first project chapter 3 first because it is referenced and used throughout the rest of the book, but aside from that, the projects do tend to get more complex as the chapters go, I tried to make it as linear a progression in that regard as possible, but you won't find, aside from the chapter 3 note, to many places where you will haev to have read a previous chapter to make sense of things.