Brueggemann is amazing.

I would also add, in no particular order:

- wisdom of the desert (merton's translation of the sayings of the desert fathers)

- pilgrim at tinker creek; annie dillard

- goatwalking, jim corbett

- Impostors of God: Inquiries into our favorite Idols, william stringfellow

- the new testament, trans. by david bentley hart

- the sabbath, Abraham Joshua Heschel

- zen flesh, zen bones

- moral man, immoral society -- neibuhr

- principia discordia

- the poetry and sermons of john donne

- many other poets.