The resource I'm looking at was just published days ago, so this question may work itself out on its own, but I want to buy Eckhard J. Schnabel's "Early Christian Mission" 2-volume series. I have already used it twice in writing research papers, but I don't have access to that university library anymore. I can't afford the $250 for the whole Pauline collection, but would love to get Schnabel. Is there a way to purchase individual titles within a larger collection?