Several characteristics suggest connecting certain psalms into groups. The Psalter is divided into five books, which is a clear set of groups. Others share the same author, such as Asaph or the Sons of Korah. Still others are of a similar type; that is, they have common internal characteristics regardless of author or place in the Psalter, for example, laments. Our presentation of the Psalms classifies them according to the types explained below. We also describe each