I just noticed that five of Lauren Haney's excellent (IMO) ancient Egypt/Lt. Bak mystery series are available for US$ 0.99. I'm not sure if this is really a "sale", since no "normal" prices are given, but they are HarperCollins agency (or at least not-couponable) books, so it is a "deal" (again IMO).
I've been to Egypt twice, and love Egyptian history, and these made me really feel as if I were in Egypt, with a great sense of setting - even though the the fort of Buhen, which is the setting for several of the books, is now underwater due to the Aswan dam.
The five are:
Flesh of the God - which is a prequel
A Face Turned Backward - #2
A Curse of Silence - #4
A Cruel Deceit - #6
A Path of Shadows - #7 (if you don't count the prequel, which was published in between #6 and #7)
search on Kobo
search on Amazon US