The collection includes a variety of religious and liturgical materials used by the Samaritans that were collected by E.K. Warren, a wealthy businessman of Three Oaks, Michigan, in the early 20th century. A majority of the collection consists of eighteen Pentateuchs, the earliest dating back to the 15th century. Other texts include Passover Prayers, prayers and hymns for the Day of Atonement, parts of the Defter, and liturgy and instructions for the Festival of Booths. Most of these materials are written in Samaritan with some instructions also provided in Arabic.