UPDATE 8/26/2018: I've referred to this thing endlessly this year. I will be watching this one for future revision/additions if they ever come. This is the bird guide for PNW, hands-down. My 5 stars stand.
ORIGINAL REVIEW: I've only just gotten into this guide and already I am simply impressed. The photography is outstanding and without being overly contrast-laden, heavily edited as several other guides tend toward (I believe editors believe this adds clarity to the markings and colors, but really it only muddies the waters since no bird appears this way naturally). The descriptions, ranges and behavioral notes are excellent, marvelous really for a book of this size. The organization is well done and the cover and binding are strong. Not much more to ask for. My previous favorite for our region is "Birds of the Puget Sound Region Coast to Cacades" Paulson, Morse, Aversa and Opperman ... but I have to admit, except for the physical size of this book, its a bit better in most ways. It's naturally larger as is covers a much larger region, but even still I'm happy to have picked it up. A new favorite.