Several Sophie Hannah titles, mostly in the Simon Waterhouse/Charlie Zailer/Culver Valley series, have dropped to £0.99 or £1.99 each at Kindle UK. Many of the books in this series have been published with multiple titles, so check carefully before you buy. (
SYKM's
page for Hannah can be useful for this.) Hannah is also the author of the "estate-authorized" continuation of Agatha Christie's Hercule Poirot series.
Link includes several strays.
https://www.amazon.co.uk/s?i=digital...price-asc-rank