The first three titles in Sherry Thomas’ Lady Sherlock series are £1.99 right now, possibly in honor of the sixth book in the series, due out in November.
A Study in Scarlet Women, #1
Buy at Kindle UK
A Conspiracy in Belgravia, #2
Buy at Kindle UK
The Hollow of Fear, #3
Buy at Kindle UK
The fourth title, The Art of Theft, is £1.99 right now at Kindle UK: https://www.amazon.co.uk/dp/B07WTPYB78
A Ruse of Shadows is the eighth and most recent (2024) in the Lady Sherlock series. It’s $1.99 right now as part of the US Kindle Daily Deal, and matched at Kobo US.
Kindle US: https://www.amazon.com/dp/B0CJTG3ZK9
Kobo US: https://www.kobo.com/us/en/ebook/a-ruse-of-shadows