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 do have multiple copies of several books, for various reasons. I have two copies of Stephen King's "The Stand," because I couldn't find my original copy and bought a replacement, then naturally found the original. Both are paperback.
There are a few books I have both the paperback (for easy portability) and the hardcover (for my permanent collection): WarDay by Whitley Streiber and James Kunetka. (The only type of book I like more than dystopian ones are post-nuclear ones). I have the hardcovers of all of the Harry Potters, and the paperback of the first three (I'll probably get the complete paperback set to give to my nephew.)
I also have several editions of "The Dark is Rising" series, because I can't seem to leave a copy if I find one in the used bookstore.
Finally, I have several copies of "Bellwether" by Connie Willis, because I love to give copies to my friends who haven't read it yet. I just love that book.
Sorry for the sparse posting: I started a new job this week, and I've just been exhausted when I got home. That should improve over the next few weeks. There are a bunch of challenges I want to start in September, so watch this space!