Probably mentioned before, but I subscribe to Kindle Unlimited.
That gives me access to a lot of what I'll call "pulp fiction," books published by Thomas & Mercer, Amazon's imprint and some other off brands. Some of those authors are more serious/better than others. I hog through them at a pretty high rate.
But, I'll say this: in the realm of non-literary fiction, some of them are pretty, pretty good.
This one, a fairly serious spy thriller, was one of the most engaging page-turners I've come across in a while.
https://www.amazon.com/Honeytrap-Espionage-Thriller-Book-ebook/dp/B0D4614BLM
It's part of a three book series with 2 and 3 as yet unreleased, so I was unable to verify if this was a one-off.
Same guy also did a series with some spy hero named Lance Spector. Haven't dug into those.
It's a pseudonym and there's no information on the author, really, but it seems he might know of what he speaks.