Occasionally, when I check out items from the library, an item would not be properly scanned and would appear on the library system as "in library" even though it is actually in my bag.
Usually when such an event occurs, I would still return the book in a week or two, depending on when I finish it; I wouldn't intentionally not return the book just because I don't have to.
Today, however, is different. The novel in question is the novel that I will use for my English final project, and I will need it until the end of December. This means that I can just conveniently "forget" to return the book until three months later!
I am so fortunate that the staff has made this kind of mistake at the right time.