This prayer book was published in 1962 after the reforms of the liturgy by Pope John XXIII. Although intended for all the members of the Dominican Family, its contents were clearly intended for the members of the third order, both secular and regular. Purchasers should NOTE that because they were lacking in the PDF provided to me, PAGES 166-265, 525-89 ARE LACKING in this reprint. These two sections gave the Ordinary of Mass and the Mass Propers of Dominican saints.