At the behest of the Second Vatican Council, Pope Paul VI greatly increased the amount of Sacred Scripture read at Mass and, to a lesser extent, the prayer formulas. This necessitated a return to having the readings in a separate book, known as the Lectionary. A separate Book of the Gospels, with texts extracted from the Lectionary, is recommended, but is not obligatory. The Roman Missal continues to include elaborate rubrics, as well as antiphons etc., which were not in sacramentaries.