I briefly flipped through the copy that the gift shop has on display and, although I didn't examine it closely enough to answer most of your questions, I can confidently predict that you (and any other A&A devotee) will thoroughly enjoy the book. It's chock full of images, and many are pictures I've never seen before.
Arcadia books tend to focus on the "olden days" as opposed to recent history, but it seems they managed to bend the rules because there were a number of more contemporary images and references. I know the author of one of the many, many Arcadia books out there, and they did a great job with her book, "Kiddie Parks of the Adirondacks". These books are a lot smaller than Ed Lewis' book, which was gargantuan.
If you go to just about any bookstore you'll find these Arcadia books on the shelves dealing with any number of topics pertaining to local history. They're all pretty similar to one another, so if you want to get an idea of what the A&A book is like, take a look at a couple. Or if you decide to ride the rails one last time before the season ends, check out the copy they have in the depot.
At any rate, the A&A book will be available in November, as Pat points out, so you'll soon see for yourself, once they hit the stores. Too bad they couldn't defer the release until the beginning of the next season, though. Nothing goes on at the A&A in November and it'll be a challenge to convince people to come out just to buy a copy rather than buy it online or head to Barnes & Noble.
Now, were they to offer a book signing excursion of some sort...