I've read a few of Garry Disher's mysteries in his Hirsch and Hal Challis series, and have liked the ones I read. But they rarely go on sale, so I'm happy to see
Day's End, which is the fourth in the Hirsch series, drop to £2.49 at Kindle UK. That's still a bit more than I like to pay, but it is the most recent (2023) in the series, so better than if it were old backlist. Sadly, it's not on sale, at least as of now, at Kobo UK. I've included the link for price-check, though. And also not on sale in the US...
Kindle UK:
https://www.amazon.co.uk/dp/B0BMRXSYT4
Kobo UK (price-check as of now):
https://www.kobo.com/gb/en/ebook/day-s-end-3