The Last Kashmiri Rose is the first in Barbara Cleverly’s Joe Sandilands series, which I’ve quite liked. It is $1.99/£0.99 right now in the US/UK.
Buy at Kindle US | Kobo US | Kindle UK
And in the UK only, there is also an omnibus of the first four titles in the series (The Last Kashmiri Rose, Ragtime in Simla, The Damascened Blade, and The Palace Tiger) that has been a very affordable £3.99 for quite a while now.
Buy at Kindle UK