The second book in the Yorkshire Murder Mystery series by J.R.Ellis. Available in ebook, paperback and audiobook formats.
Interesting and well written, but predicated on a seriously hackneyed and against-the-rules plot device. Did I enjoy it? Yes. Would I recommend it? Yes. With a caveat. Expect major eye rolling at the denouement.
Worth noting for Kindle Unlimited subscribers; this title is available for KU.