Today’s Big Deal at Kindle UK is all eleven books in Nicola Upson’s Josephine Tey series, featuring Tey as the protagonist. I’ve felt this series is a bit up-and-down, but mostly more up than down. And they are only £0.99 each, so you can try one or two and see if you like them. Sadly, these prices don’t seem to be matched at Kobo UK.
Find the Big Deal webpage at Kindle UK.