AAA's National Park Photography is a book that never seemed to get much attention. I have found it quite useful when my time in the park is limited. There have been a few occasions when I was traveling for other business and decided to tack on an extra day to explore a nearby national park. This book shows you where the "hot spots" are so you can prioritize rather than aimlessly wandering through the park (though there's something to be said for aimlessness when time is on your side). It also tells the best times to visit the park, which can be very helpful.
Will you come back with pictures that have been taken before? Of course. Will you take other pictures along the way? Most likely. Will one of them be original? I hope so.
My only gripe with this book is that the binding is somewhat poor, causing pages to fall out. This can be turned around into a bit of an advantage though, because it means you only have to take the pages that concern the park you're planning to visit. Every little bit of weight savings helps when you're packing, and this is no exception.
The bottom line is that this book can be a big time saver and has the tips that most photographers are looking for.