From the email I received, which does not appear to be targeted:
"Tomorrow is my birthday and of course, after that it’s Christmas for those who celebrate.
USE THE DISCOUNT CODE HAPPYBIRTHDAY44 BEFORE DEC. 24 AT 11:59 PM (PST) AND GET $5 OFF ANYTHING YOU WANT, EVEN IF IT'S JUST A $5 EBOOK. MERRY CHRISTMAS."
(Caps are in original email. Please don't blame me for allcaps screaming.)
List of products at:
Code can be reused so 1 ebook per order makes the $5 ebooks free.
Some books are better than others but you can't argue with the price.