There is the possibility to submit articles to the planned monograph

Quo Vadis, Metaphysics?
Essays in Honour of Peter van Inwagen
on his 75th Birthday

without participating in the conference.

The following people have already submitted their texts:

Graham PriestObjects that are not Objects, 15 pages
Nicholas RescherOptimalism in Explaining the Nature of Things, 38 pages
Eleonore StumpThe Problem of Evil and Atonement, 30 pages