Hollow Square Books is a small publisher and distributor dedicated to the history and traditions of shape-note singing in the Sacred Harp style, and the spiritual folk music it draws from. Rooted in English psalmody, refined in the colonial North, shaped in the Mid-Atlantic and frontier West, and fully realized in the Deep South, this uniquely American tradition has since revived in the North and spread across the world. Our publications celebrate this living music—sustained by strong voices, square formations, and the enduring spirit of communal song.