Sainsburys UK has a 99p sale and there is quite a large mystery/thriller section. I like the Sainsbury presentation, just hover over the book and there are choices to preview book etc. Don't forget to check Kobo etc to see if there is a price match. Whilst non UK people can't collect the points, Sainsbury still have many good sales we can take advantage of.
Mystery link:
http://www.sainsburysentertainment.c...ach/7654540/ff
Here's the thriller/suspense link:
http://www.sainsburysentertainment.c...ach/7654540/fh
Psss .... I think both links have the same, or mostly the same books ...