Most of the time it just shows "Bible Study Magazine" or has nothing listed at all:

Is there any way you could make that section more useful? Look not only at the things customers bought in the same shopping session but recommend other books that the same customers bought at other times, perhaps? Amazon.com does a much better job at suggesting relevant books in their "customers also bought" section (though I understand that Amazon has a much larger customer base so they have more data to go on).