For Massimo Faggioli, the debate about the meaning of Vatican II too often misses the profound significance of that council's first and perhaps most consequential document, Sacrosanctum Concilium. The result is a misunderstanding of both the council as a whole and the liturgical reform that followed from it.In True Reform, Faggioli takes Sacrosanctum Concilium as a hermeneutical key to the council. He offers a thorough reflection on the relationship between the liturgical constitution and the whole achievement of Vatican II and argues that the interconnections between the two must emerge if we want to understand the impact of the council on global Catholicism.