Do you have Christmas money burning a hole in your pocket? Gift certificates to spend? Want to get the biggest bang for your buck? Try these online sources for free and/or cheap e-books. (Note: I’m not affiliated in any way with any of the websites or with Amazon–I just happen to own a Kindle, so these are the sites that I check.)
Discounted/Price Dropped Kindle Books thread A thread on the Amazon message boards where people post price drops for e-books, mostly for US readers (though there are regular posts from Aussie and French Kindlers, too). No indie/self-published books. All genres. Occasionally Barnes & Nobel sales are mentioned here, too, since Amazon price-matches, so Nook readers may find this useful.
Free Today Second Edition thread Another thread on the Amazon message boards, this one dedicated specifically to free romance e-books for US readers. The prices on these often change quickly, so start with the newest post.
Daily Cheap Reads I did a post on this website back in August, but it doesn’t hurt to mention it again. This site is dedicated to books, apps, and audiobooks for under $5 in the US. There is a companion site for UK readers, and one focused on cheap reads for children and young adults.
eReaderIQ A website dedicated to freebies, price drops, e-books under $1, and newly kindle-ized books. You can visit the site and look around on your own, or set up notification for books or authors and let the site do the work for you. Books published in all varieties are included, from all genres. US readers only.
Goodreads Bargain Basement Group Freebies, bargains, and giveaways for Nook, Kindle, and Smashwords. Includes all genres, seems to be US only.