The Music of What Happens is the third in John Straley's Cecil Younger series. A few of the books in this older series won/were nominated for Shamus awards. It's $1.99 right now in the US, and even less (see below) in the UK.
Kindle US:
https://www.amazon.com/dp/B075WB1C6L
Kobo US:
https://www.kobo.com/us/en/ebook/the...f-what-happens
Kindle UK, £0.80:
https://www.amazon.co.uk/dp/B075WB1C6L
Kobo UK, £0.99/discountable to £0.68:
https://www.kobo.com/gb/en/ebook/the...f-what-happens