This new regional guide is one of many covering all or part of the “Pacific Northwest” (or “the Pacific Southwest” if you’re from north of the Canadian border). I confess to having felt inundated by the annual flood of new bird guides. So my first question was, “What’s new here?” The authors confront this issue head-on: “Our working concept was to fill a niche between, on the one hand, the scientifically intense state and provincial ‘Birds of …’ tomes, … and, on the other hand, the widely used North American field guides which … depict ranges and seasonal movements only at a broad continental scale (p. 6).” Their book also complements a plethora of guides limited to one or another local county and beginners’ guides to one section or another of the Pacific Northwest. This guide is definitely not just for beginners. It builds on three previously published more narrowly focused regional guides by these same authors (Birds of the Willamette Valley Region, R. W. Morse Co., 2004; Birds of the Puget Sound Region, R. W. Morse Co., 2004; and Birds of Southwestern British Columbia, Heritage House, 2010). Aversa and Opperman are based in western Washington, where they have devoted careful attention to the local avifauna for several decades each, while Cannings is of a family of highly accomplished British Columbia naturalists. They know the region and its bird life exceptionally well, which they define to include Oregon, Washington, Idaho, western Montana, and southern British Columbia from the continental divide to the continental shelf. To cover this broad region better, they enlisted advice from experts from Oregon, Idaho, and Montana to complement their first-hand knowledge.