Making a clamshell box

One of the tasks at my day job is the creation of custom enclosures for items that need housing. It doesn't come up very often but when it does it's a welcome change of pace and a nice challenge. I used to make clamshell/dropspine enclosures all day long at my first bindery job, but this is probably the third or fourth one I've made in the last ten years. This particular one was needed for a stack of wood-bound, accordion-fold books that were beautifully, but awkwardly, housed in a wooden box. It is a circulating item, so something a little more practical had to be created.