Do you have multiple copies of any of your books? If so, why? Absent-mindedness? You love them that much? First Editions for the shelf, but paperbacks to read? If not, why not? Not enough space? Not enough money? Too sensible to do something so foolish?
I don’t usually have multiple copies of books. I’m not sure why not. Maybe because I don’t generally collect books for the sake of collecting, except for antique books. Maybe because we just don’t have room. The few multiples we’ve had have been because my wife and I brought copies of the same book to the marriage. That happened with Wuthering Heights and Madame Bovary. In each case, we donated one copy.