Kevin Wignall, A Death in Sweden

Dan Hendricks is a sort of freelance bounty hunter/assassin kind of guy, a one-time operative with the CIA who's now being hunted by his former employers. To save himself—it's a long story—he winds up hunting down information about an enigmatic loner who died in a bus crash in Sweden. And it turns out that the reason he was an enigmatic loner is pretty interesting. A very readable book, which I picked up as a Kindle First freebie a few weeks ago. I can see this one being the start of a series, with Dan being dragged back into his old job every now and again for a new adventure.