I am happy to note that a new edition of Nevin’s The Mystical Presence is out and available. Check it out here. The Reformed tradition is wide river, not a babbling brook.
On a completely different note, but just as cool, I just read through the small booklet Cycles — a primer on astonomy — and learned some good stuff. Anybody who wants to teach the comings and goings in the sky to their kid (and astronomy was part of the Quadrivium, was it not?) should get this booklet. That, and the iPhone app Star Walk.