There are a number of mysteries on sale in the Kindle Big Deal (US), posted in
this thread, or in
this post if you don't mind using arcadata's affiliate link. The Big Deal is good through Feb. 2.
There are too many (68 books) to list, but authors I recognized include Laurence Shames, Linda Fairstein, Ian Rankin, Richard North Patterson, Rory Clements, Susan McBride, Stephen Booth, Shirley Rousseau Murphy, Ed McBain, Michael Robertson, Frances Fyfield, Don Bruns, and others. In most cases there are just one or two books by each author, but more in a few cases.
Some are by major publishers and have the same prices at BN or Kobo if you prefer epubs. I spot checked a few and found the Susan McBride, Rory Clements, Richard North Patterson, and Shirley Rousseau Murphy books to be similarly priced at either Kobo, BN, or both.
I personally lean towards historical mysteries, and have read and enjoyed the Rory Clements/John Shakespeare books, two of which are in this sale.
Anyway, YMMV, but probably worth checking out...