The collection In hymnis et canticis offers a representative cross section from the repertoire of Gregorian chant: It contains 109 selections ranging in difficulty from easy to more demanding and includes the most important chants from the Proper for the church year, the most important chants for the Mass, as well as additional hymns, antiphons, psalms and cantica. The book will be of interest to all ensembles (scholas, church choirs, etc.) who are concerned with Gregorian chant and it is appropriate for beginners as well as for experienced scholas.