Some may have heard the idea “the new liturgical movement” used nowadays to describe a recovery of the sacred Liturgy that understands a continuity in the Liturgy that has existed through the ages and not just made up by scholars and hacks. John Allen explores the origin of this idea according to the thinking of Pope Benedict in a brief NCR article, “What Benedict means by a ‘new liturgical movement.’
I would also recommend the book referenced by John Allen, Milestones. It is necessary reading for all sorts of things, not just trying to understand Joseph Ratzinger.