Al Casullo has two books forthcoming from Oxford University Press. The first is Essays on A Priori Knowledge and Justification (Oxford, 2011). This collects some of Al's more influential papers on the a priori as well as four new papers. The second forthcoming book is The A Priori in Philosophy (Oxford, 2012). Al co-edited this collection with Joshua Thurow as well as contributing a paper to the collection and co-authoring the introduction.