A Celtic Psaltery contains a collection of songs for direction and protection, including hymns for the morning and evening, which Celtic people wrote and used in personal prayer, or as part of the ritual of ordinary village life.

The Celtic people had an enduring love for the psalms, which gave them the longing to express their love for God and a feeling for verse.

These songs and prayers are divided into 11 main segments, with titles like creation, morning, evening, protection, etc. Each segment opens with a full page illustration on the facing page.