Back in the Peterson days we received the wisdom that warblers are confusing. Especially difficult are first-fall birds, but also fall adults having re-robed themselves for the flight south, leaving many of them looking rather plain (compared to their spring livery, that is). Subsequent warbler guides began to elucidate finer identification points—the standout being Dunn and Garrett’s 1997 A Field Guide to Warblers of North America—a brick of natural history and identification information and lovely painted plates (the most famous [and useful] of which are the plates of tails/undertails on pp. 105–106). Dunn and Garrett’s had few color photographs and sonograms—and, after revolutions in digital recording and photographic technologies, that is where The Warbler Guide steps in. With the help of this new photo- and sonogram-rich guide to these colorful (even in fall) and charismatic nymphs of our nearctic woodlands, much confusion, especially for beginning and intermediate birders, should be dispelled.