Frank Chapman’s illustrator was also responsible for his own series of pocket sized guides for beginning birders. Two oddly shaped little books appeared in 1905 and 1906, published by Doubleday. They were long and narrow, about the size of a checkbook, each simply titled Bird Guide; one covered waterbirds, game birds, and raptors, and the other covered songbirds of North American from the Great Plains east. Each page had a color painting and a short text describing the birds’ plumage, voice and range.
There’s a site here with more information about Reed and all of his publications, if you would like to learn more.