Reddit mentions of Holy People: A Liturgical Ecclesiology

As a current student in Seminary (Lutheran, on my Vicarage year), I think very highly of the Book of Concord, written by the German reformers who would eventually become known as the Lutheran Church.

I also can't recommend highly enough Paul Tillich's Systematic Theology vol I II & III. They're notoriously dry, but incredibly brilliant and fairly concise, given the topic he works with.

Gordon Lathrop is also an incredible author, and has changed the way I understand the liturgy, tradition, and the Church itself. His 'Holy ____' trilogy (Holy Things: A Liturgical Theology, Holy People: A Liturgical Ecclesiology, and Holy Ground: A Liturgical Cosmology) is something that I think many Christians would find insightful, interesting, and surprisingly poetic.