I frequently check the Sony e-bookstore for the freebies. Click on "bargain-priced" and there's an option for free books. I find most turnover happens on the 1st of the month but others have popped up every now and then. I also use my library's Overdrive site to borrow books for free. Sure, the selection's not that great, but they're adding more titles frequently and I haven't read through my entire wishlist yet. I can take 6 out at a time and get 3 weeks on them (expiration date driven by the date/time settings on the reader).