Amazing.
Sometimes I read the Pulitzer-prize winning books and I just don't get it--I don't know why the judges would choose that book over any other decent book of a particular year--but this book is an exception. It's a masterpiece.
This book is incredibly long and examines a pretty intimidating subject--the geography of America--but McPhee has illuminated the subject in such a way that compliments the multi-dimensional history of a land and its people. At times he "zooms out" to give the reader a mind-boggling view of geological epochs, and at other times, he'll give us close, intimate portraits of people who have studied this land and how they view it. He drops in complex geological terminology with lovely descriptions of landscapes and somehow it all makes sense.
It's taken me a year or so to finally finish this monumental book, partly because it's so long, and partly because I'd stop and re-read portions, or mark pages, but I wouldn't hesitate to recommend it to any serious reader. And honestly, I can't overstate this: this book has changed the way I see this land, and this earth, and has made me proud to be a part of it's complicated history.