Choker is the fifth in Frederick Ramsay's Ike Schwartz series. It's $1.99 in the US right now and discountable at Kobo US.
Kindle US:
https://www.amazon.com/dp/B07VQPKPKB
Kobo US:
https://www.kobo.com/us/en/ebook/choker-22
And
Secrets, which is the second in the series is on sale again as well. I wouldn't normally post it since it wasn't that long ago, but since I posted this one, here's a
link to the previous post for Secrets.