Per @Mort1997 above, the first title in Carrie Doyle's Hamptons Murder series,
Death on Windmill Way, is free also at Kindle and Kobo US, and the next two titles are discounted, with a fourth non-discounted title coming soon. And they are also VIP/couponable at Kobo US. I'm slammed for time, so if you're in the UK, you'll need to take a look for yourself (sorry), but since @Mort1997's posts were for the UK, they are probably on sale there too. Use caution -these may be different "editions" - some of my prior purchases aren't showing up as purchased...
links for the series:
Kindle US:
https://www.amazon.com/gp/product/B0...kindle_edition
Kobo US:
https://www.kobo.com/us/en/search?qu...9-310b36d4b66b