A Man Called Ove by Fredrik Backman
They don't make men like Ove anymore. He's just a man who worked at his job and loved his wife. Now at 59, forced into early retirement not long after his wife died, there nothing left to live for. That's when Ove decides to do something about it, but one thing or another keeps gets in his way.
This is yet another "if you liked the Unlikely Pilgrimage of Harold Fry, you'll love this" book. But just as I noted in my review of The Extra Ordinary Life of Frank Derrick, Age 81, Ove is no Harold Fry, and nor are either of them Frank Derrick. If pressed, I'd say that Ove is more like Harold Fry than Frank Derrick. Of course, the most obvious thing that these three men have in common is that they are older men. Notice I didn't call them "old men" here, because despite whatever ages they may be chronologically, none of them meet my criteria for being totally old. This is mostly because they each have a purpose and each of their stories tells us how they go about trying to achieve what they aim to do. In Ove's case, what he's trying to do is kill himself so he can be reunited with the only person who ever "got" him, his wife Sonja.