This week, Smashwords is hosting Read an Ebook Week, which is basically a huge promotion on ebooks all across their site. I'm participating this year by offering Hanged to Death and Tweet the Police for free. The Aspen House and The Fornarina Affair are both 50% off ($1.50).
There are a ton more authors participating, so if you like a deal be sure to check out Smashwords' Read an Ebook Week catalog for more discounted books!