Kobo US is having an under $1 sale, most, if not all, also coupon/VIPable. Sale is through May 7. I actually spotted a few titles that are not the usual...
The best deal that I saw was
Meet Collins and Burke, an omnibus of the first three titles in the Collins and Burke series by Anne Emery:
Sign of the Cross,
Obit, and
Barrington Street Blues. Link:
https://www.kobo.com/us/en/ebook/meet-collins-and-burke
I also spotted titles by: Peter Bowen, Jane Langton, Shirley McKay, Barbara Corrado Pope, Denzil Meyrick, Elena Forbes, William F. Buckley Jr., Kjell Ola Dahl and others. Not a lot of titles by any one author, and some are first in series that go on sale often, but still, I spotted a few titles of interest, which is sort of rare for me in Kobo's sales.
link to the sale page:
https://www.kobo.com/us/en/p/99sale18
Oh, and I missed "Cozy Mystery" and "Thrillers" sections further down. Additional authors I recognize or find interesting: Carl Hiaasen, Jack Higgins, Randy Wayne White, Raymond Benson, Ian Hamilton (oddly enough, listed in the cozies) and Elaine Viets.