Faceless Killers is the first in the Kurt Wallander series by Henning Mankell. It is a US Kindle Daily Deal today at $1.99, matched (and coupon/VIPable) at Kobo US.
Kindle US:
https://www.amazon.com/Faceless-Kill...dp/B005MYTEJC/
Kobo US:
https://www.kobo.com/us/en/ebook/faceless-killers-6