well, I assume you've already gone to knittingfever.com. Both books are showing as 'new' there. My guess is they're so new they haven't shipped yet. I clicked on the 'buy' botton there, but it doesn't let you buy it direct from there, but sends you to your zip code listing shops that carry their books. Also gives a list of internet shops. the few I clicked on that offer those 2 books are all pre-order. If any local shops pop up for your area, I imagine they will order them for you, if they don't already have some on order.
A lot of sites that let you pre-order don't charge your credit card until they come in and you actually place an order. You might have to call them to make sure, as some will charge you immediately, some will just charge and ship when the books come in.