Just a quick share. At Scholastic Teacher Express, there is a dollar deal for over 500 books where every book is available for only a dollar as a PDF download. Most of the books are for lower elementary grades but are worth a look. You need a paypal account and will need to make an account with scholastic, but that is pretty straight forward and I was able to download my books in a matter of minutes. No waiting for the shipping! Offer closes end of January.