These look pretty thriller-ish, but the Kindle UK Big Deal of the Day is the six titles in David Baldacci's Michelle Maxwell and Sean King series for £0.99:
- Split Second
- Hour Game
- Simple Genius
- First Family
- The Sixth Man
- King and Maxwell
link for all (this is a really messy link, but I don't see an affiliate tag, and it comes from starting at amazon.co.uk and clicking directly through):
https://www.amazon.co.uk/b/ref=s9_ac...d_i=5400977031