The first volume has just been released! I helped provide some of the footnotes from the Early Church Fathers and Medieval commentators. Check out the interior preview! amazon.com/St-Jerome-Study-Bible-Pentateuch/dp/1503327043/ref=sr_1_5?ie=UTF8&qid=1420336469&sr=8-5&keywords=john+litteral
how many volumes will there be?
There are many more volumes to come, but eventually the whole Bible will be one volume. But in the meantime, instead of waiting until the whole project is done before providing anything, the decision has been made to provide volumes as the project progresses.