Book excerpt: "Liturgical Theology" is often a convenient label for any theology that has loosely to do with worship or Eucharist. In this innovative book, David Fagerberg distinguishes liturgical theology from a general theology of worship. He proposes two defining attributes of liturgical theology: (1) "lex orandi": It is manifested in the Church's historical rites. (2) "theologia prima": It is theology done by the liturgical community. Theologia Prima is a thorough revision of Dr. Fagerberg's groundbreaking, What Is Liturgical Theology? A Study in Methodology (1992). It contains three new chapters as well as well as more anecdotal material derived from Dr. Fagerberg's extensive experience as a teacher and theologian.