A great deal of material has come from the pens of various writers on boy life in the last few years. Quite a little, also, has been written about the Sunday school, and a few attempts have been made to hitch the boy of the teen years and the Sunday school together. Most of these attempts, however, have been far from successful; due, in part, to lack of knowledge of the boy on the one hand, or of the Sunday school on the other. Generous criticism of the Sunday school has been made by experts on boy life, but this generally has been nullified by the fact that the critics have had no adequate touch with the Sunday school or its problems--their bread-and-butter experience lay in another field. "The Men and Religion Forward Movement," in its continent-wide work, discovered not a few of the problems of the Sunday school, and attempted a partial solution in the volume on boys' work in the "Messages" of the Movement. It was but partial, however, first, because the volume tried to deal with the boy, the church and the community all together, and second, because it failed to take into account the fact that there are two sexes in the church school and that the boy, however important, constitutes but a section of the Sunday school and its problems. In view of this, it may not be amiss to set forth in a new volume a more or less thorough study of the Sunday school and the adolescent or teen age boy, the one in relationship to the other, and at the same time to set forth as clearly as possible the present plans, methods and attitude of the Sunday school, denominationally and interdenominationally.