i have no idea - since I did not collect the individual comics - but it looks like IDW has created their own limited series - there are a few other of their comics in this category. They have created a premium of limited editions - but they do not list how "limited" the Locke and Key comics are (they do list print runs for some of the other comics). I do not own a copy of Locke & Key - guide to the keys - is this a worthwhile one-shot to add? It seems like this too is added in their limited collection.
ct