November Road by Lou Berney has been shortlisted for the 2020 Gold Dagger award, though it was first published in 2018, so you may have come across it already (and indeed it made our list of best thrillers of 2019). It’s not exactly a mystery, it’s more of a chase story, combined with historical fiction, since the plot doesn’t exactly revolve, but mostly stems from the assassination of John F Kennedy. The main character works for a gangster, so if you prefer your mysteries not to include organized crime, it probably shouldn’t be top of your list. That said, it’s still reasonably light and enjoyable.
Best Mystery Books of 2020