No Shred of Evidence is a fairly recent (2016) title in the Inspector Ian Rutledge series by Charles Todd. It has dropped to $1.99 at Kindle and Kobo US.
Kindle US:
https://www.amazon.com/No-Shred-Evid...dp/B00WR12KU8/
Kobo US:
https://www.kobo.com/us/en/ebook/no-shred-of-evidence