Some good stuff there including Dan Brown, John Grisham and Dean Koontz' latest. Discounts are a mixed bag. While all are just $5, some are discounted from list price of $7.99 while others are discounted from as much as $15.99. Also, the list above is for mystery/thriller. In addition, there are:
Fiction
Non Fiction
Kids and Young Adult
Romance
Science Fiction and Fantasy
All with some good stuff. I decided to get Darkly Dreaming Dexter (it's a novel on which Dexter the TV show is based). It's $7.59 on Amazon and regularly $9.89 at Borders (according to Ink Mesh).
Finally, it says limited time only but doesn't specify a time period. Thanks for pointing this out Jbcohen. I don't usually bother with Borders, but this is a good deal.