Wantlists can be handled in different ways, but the goal is always the same: get more access to books you need at the lowest possible cost. One of the best methods to do that is by utilizing wantlist reworks. A rework is when your wantlist is compared to the available inventory more than once a day. For example, when you submit a wantlist to MBS and leave it there for a length of time, it can be compared against our inventory multiple times a day. Each time the list is compared, that is a rework.