Wait...so you just bought them, huh... Well, if you can return them, then it's fine.
And you say you can't wait for them to get hardcovers, yet you've already waited months after their release to buy them, so what's the harm in a couple of more days?
Anyway, I always pre-order mine online at RightStuf. They usually have a Yen Press 40% off sale right before the release of every Haruhi light novel (at least, they have so far, anyway), and despite Haruhi's light novel being licensed by Little Brown, it's included in the sale. With this, not only is it cheap, but I don't have to wait for the bookstore to have them in stock and on their shelves; I always get mine a couple of days BEFORE street date, actually.
Oh, I guess it's because I e-mailed it from my phone to myself (since my iPhone currently won't let me transfer photos to my computer...which it dumb), so only I can view the image. I'll have it changed soon.