I am looking to buy 3 books, but 1 of them is out of stock at the moment. If I do the free super saver shipping, will they ship all 3 books at once at the time the book comes in stock? Or will they first ship the 2 and then the third at a later date? Sorry, I'm not sure where the best place to post this is, but I figure you guys have bought from Amazon before :). Anyhow, I appreciate your help! Oh, this is for Amazon.ca, if it makes any difference.