Some popular titles on sale from one of my favorite authors. (I have every one of her over 100 books). I found one ebook version on sale that I don’t have yet.
See http://deals.kinja.com/crack-the-case-with-this-agatha-christie-ebook-sale-1795157345 
Crack the Case With This Agatha Christie eBook Sale
My only experience with Agatha Christie involves an episode of Doctor Who with a giant alien wasp, but if you’re a huge fan of classic mystery novels, this sale is for on. Today only, choose from 25 eBooks of Christie’s work for just $2 each, but you won’t need a detective to figure out that these prices will disappear without a trace at the end of the day.